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When biblatex citations render as [?] despite a correct .bib file, the fault usually lies in the build pipeline or auxiliary files rather than the source data. This guide walks through the checks and fixes.
A practical diagnostic guide for LaTeX citation undefined warnings and empty bibliographies with biblatex and BibTeX, covering backend mismatches, .bbl inspection, package conflicts and verification steps.
Stop fighting with .bst files. Learn when to use legacy BibTeX and when to upgrade to BibLaTeX and Biber for full Unicode support and easier styling.
A decision guide comparing BibTeX and BibLaTeX/Biber for LaTeX bibliographies, covering Unicode support, publisher constraints, and a minimal validation workflow.
For documents requiring Unicode support, complex citation styles, or locale-sensitive sorting, biblatex with the biber backend is the superior choice over traditional natbib.
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