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A fabricated reference can look exactly like a real one until someone searches for it. The annotation underneath is harder to fake: a fluent paragraph describing a paper's method and findings in detail, for a paper nobody wrote.
A research paper does not run on one tense. This is the section-by-section table for what belongs where, including the past-versus-present-perfect split in a literature review that trips up even careful writers.
Perplexity gets the attention, but the arithmetic underneath it is token probability: what the model's distribution over the next word actually contains, why detection math runs in log space instead of raw probability, and how a string of per-token scores becomes one number.
Most advice says collect broadly, then look for a pattern in what you found. Reverse it: state the claim first, then search only for what would confirm or break it. This post covers citation chaining in both directions, building a search string from the claim itself, and knowing when to stop.
Presentation is what students polish the night before a deadline. A published marking rubric says it is usually the narrowest of the categories that decide a grade. Here is where the weight actually sits, and why.
BibTeX and BibLaTeX store citations in a similar file, but they process and format that data in completely different ways. Here is the backend difference that actually separates them, why BibLaTeX handles non-English and unusual sources better, and what switching actually costs.