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formatting - BibLatex -> group multiple citations by the same author - TeX - LaTeX Stack Exchange
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Citations with LaTeX and BibTeX - Math Majors' Seminar - LibGuides at Trinity University
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Bibliography management in LaTeX - Overleaf, Online LaTeX Editor
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BibTeX - Wikipedia
Citations with LaTeX and BibTeX - Math Majors' Seminar - LibGuides at Trinity University
Bibliography management with bibtex - Overleaf, Online LaTeX Editor