On the proof of Ptolemy’s Lemma
Đura Paunić
University of Novi Sad, SerbiaGerhard Wanner
Université de Genève, Switzerland
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Cite this article
Đura Paunić, Gerhard Wanner, On the proof of Ptolemy’s Lemma. Elem. Math. 72 (2017), no. 2, pp. 80–82
DOI 10.4171/EM/328