Searching for literature
A literature search is a crucial step in conducting original research. It helps you formulate your research question and plan your study. With so many scientific publications available, finding & selecting relevant articles can be challenging. This article explains the different search methods, with relevant resources, tips and instruction videos.
Search methods
If you need the full text of a specific publication and you know the author or title, you can check its availability in WUR Library Search. You can also search in Google Scholar.
- Put the title within double quotes, e.g., "packaging of food"
- Use filters like author or publication year to narrow your search
- Once you find the publication, click on the Get it! link "WUR Library"
- See the Library Guide on WUR Library Search for detailed instructions.
- See this Library Guide on Google Scholar for more tips.
If you don't exactly know what you're looking for, or if you require only a few sources on a topic, begin with a simple or basic search in a broad scholarly search engine or multi-disciplinary database, like WUR Library Search, Google Scholar or Scopus. Type in a few keywords and refine your search.
- Identify primary concepts and combine them with AND
- Put short phrases or multiple search terms within double quotes
Example: "Climate change" AND "food security" AND policy
A systematic literature search is a thorough, systematic and repeatable search of a range of literature (for example, books, peer-reviewed articles, etc.) on a certain topic in a bibliographic database. This requires you to carefully choose your search terms, databases, and methods, and reflect on the results you obtain. A systematic literature search helps you avoid bias, identify research gaps, and prevent duplication of existing studies.
Systematic searching involves a series of iterative steps, and you may need to revisit some of them multiple times during your search.
- Select the most appropriate database. You can use the Library Database Finder to find the appropriate database.
- Formulate your research question.
- Identify primary concepts and relevant search terms, including synonyms.
- Combine concepts and terms with the operators AND/OR.
- Use wildcards like * to find word variations.
- Limit your search to title, abstract and keywords.
- Adapt and repeat your search in more databases.
- Always check the database manual for exact rules on how to build your search query.
Example: ("natural disasters" OR "natural catastrophes" OR flood* OR landslides OR "natural hazards") AND (farm* OR agricult* OR crops OR livestock) AND (coping OR deal OR "risk reduc*") AND (losses OR yields).
Be aware: Google, and particularly Google Scholar, can be useful for simple searches, but are not recommended for systematic literature searching or systematic reviews. They do not allow precise filtering, lack transparency in their coverage, and can include duplicate or non-peer-reviewed sources.
If you want to double-check whether you have found all the relevant publications on your topic, or if you want to get familiar with a topic, you can use the "following a thread" method. First, you select some highly relevant publications. The reference list of these publications leads you to older publications on your topic. If you look up these references in a broad search engine or database Scopus, or Google Scholar, you will likely find more recent papers that cite this publication.
Systematic reviews and other review types
In some disciplines, systematic reviews and other review types, such as scoping reviews, have become more common to manage the growing volume of publications and to provide reliable evidence. These systematic review types follow the principles of a systematic search.
In addition, they must be comprehensive, transparent, repeatable and unbiased. To meet these requirements, explicit and standardised rules apply, and a protocol has to be developed in advance covering all steps in the systematic review, including the review question, exhaustive literature search, study selection, and data extraction & analysis.
Check the sources on the right or contact a Library information specialist for advice.
- VU Libguides on Systematic Reviews
- Library Guides/ Systematic Reviews University of Groningen
- Systematic Reviews in the Social Sciences: A Practical Guide
- Cochrane Handbook for Systematic Reviews of Interventions
- Guidelines and Standards for Evidence Synthesis in Environmental Management
- Systematic Reviews in Educational Research
- Good review practice: a researcher guide to systematic review methodology in the sciences of food and health
- Systematic reviews tutorials for searching health science literature, Yale University
Using AI search & select literature
Some AI tools can help you search for scientific information.
Useful AI tools
These fall into two categories: tools that provide a list of references based on your prompt, such as Elicit or Consensus, and tools that provide a map of interconnected and linked papers, such as Connected Papers or Litmaps. A curated list of these tools with information on the underlying database, privacy policy, limitations, and costs is offered by the Tübingen University Library, see Literature Research with AI – Tools and Introduction.
WUR Library strongly advises using these AI tools only in addition to systematic searching for literature in bibliographic databases, such as Scopus, CAB Abstracts, or PubMed. The scope of the AI-based tools is limited and may be restricted to a specific field of study or to open-access publications only. You may also miss relevant literature because these tools suggest only a limited number of articles.
What about using GenAI tools?
You may be tempted to quickly find scientific information on a topic by typing a prompt in genAI tools, such as ChatGPT, Copilot or Gemini. However, the underlying data and parameters in these chatbots are unknown, and the answer you get may be biased or incorrect (hallucination). These tools have not been developed to search for scientific information and you should not use these for that purpose.
However, you can use tools like ChatGPT to help you construct your Boolean search query for a bibliographic database. Note that you must know how your chosen database works and how to carefully choose prompts to get a good output. Realise that you still may miss important search terms, that the syntax of the genAI-generated query may be incorrect and that you will not use all functionalities that a bibliographic database offers. You can find examples of prompts you can use to help you create search queries for bibliographic databases in the Libguide from Birmingham City University.
Learn more
Explore the Library's e-learning modules and Library guides below. You are welcome to join one of our courses and workshops on finding literature or contact an information specialist for more support.
Ask a librarian
Are you a WUR researcher, teacher, or student, and do you need support with finding literature? You can contact the Library's information specialists. We can support you with searching for literature, building search queries, selecting a database, and citing and referencing.
Servicedesk Facilities
How to search & access literature?
In this video, we explain how you can get access to Library resources such as online journals and ebooks. Topics include off-campus access, how to use WUR Library Search and scientific databases, EndNote, and what to do if WUR Library doesn’t have the publication you are looking for. CC-BY-NC-ND 4.0
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