How to Find References for a Course Paper: A Three-Layer Screening Approach with a Paper Search Assistant
When I wrote my first course paper in sophomore year, this is how I found my references: I searched keywords on CNKI, looked through the first two pages, picked titles that looked similar, and copied the citations.
After I submitted it, my instructor’s comment was: “The cited references are not closely related to your discussion.”
Only later did I understand that references need to be viewed in layers; you cannot just gather enough ten of them.
Layer 1: The last three years, used to see “what people are discussing now”
First choose three to five keywords, filter by year for the last three years, and look at the titles in that batch.
The purpose of this layer is not citation; it is todetermine whether anyone is still working on my topic and what angles people care about. I usually keep only five to eight papers and read the abstracts.
MuchSci’s Paper Search Assistant can filter by year and citation count, and search 180 million Crossref papers by title, author, and DOI—at this layer, I go through the titles and abstracts there.
Layer 2: The classics, used to support “what this concept is”
Papers from the last three years usually will not explain basic concepts for you. At this layer, I look for older literature that has been repeatedly cited: the ones mentioned in textbooks and the ones treated as sources in literature reviews.
The criterion is simple:if three different authors cite the same paper for the same concept, that paper is very likely the source.
Layer 3: Method sources, used to support “why I calculated it this way”
If a paper uses a certain method, indicator, or questionnaire, the method itself needs a source. This layer is the easiest to overlook and the easiest to be questioned about.
My current habit is: every time I write “using such-and-such method” in the methods section, I always follow it with a citation.
How the three layers become a table
| Layer | Purpose | How many I keep | How to judge it is enough |
| Last three years | Define the topic, see the angles | 5–8 | I can state the current mainstream angles |
| Classics | Support concepts | 2–4 | The concepts have sources; they are not defined by me |
| Methods | Support methods | 2–3 | Every method has a citation |
The three layers add up to about ten papers, which is far more useful than “scraping together twenty.”
One thing I always do before citing
I check every citation against the original text. A similar title does not mean the content matches, and an abstract that sounds similar does not mean the conclusion supports my claim.
When checking, I verify the DOI, authors, year, volume, issue, and page numbers item by item—if any item does not match, a reviewer or instructor can spot it at a glance.
My actual change
After I revised my approach with this method, my course paper references went from “fifteen papers just to fill the number” to “ten papers that are all useful.” My instructor wrote in the comments, “The citations align with the discussion,” and that was the first time I felt there was a method to writing papers.
Now whenever I write anything, I first ask myself:Which layer does this paper belong to? If I cannot answer, I do not cite it yet. I leave the search step to MuchSci because it is faster than flipping through manually, but which paper to cite and which sentence to cite it in can only be judged by me.
As forAI assistants for college students, it was only at this point that I understood what I really need: rather than finding papers for me, I want help clarifying the process of finding them.