BibTeX: |
@article{Ptolemys_Theorem-AFP,
author = {Lukas Bulwahn},
title = {Ptolemy's Theorem},
journal = {Archive of Formal Proofs},
month = aug,
year = 2016,
note = {\url{http://isa-afp.org/entries/Ptolemys_Theorem.html},
Formal proof development},
ISSN = {2150-914x},
}
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