Flaška, V.; Ježek, J.; Kepka, T.; Kortelainen, J. (2007), Transitive Closures of Binary Relations I(PDF), Prague: School of Mathematics - Physics Charles University, p.1, S2CID47676001, archived from the original(PDF) on 2018-04-06, Lemma 1.1 (iv). Note that this source refers to asymmetric relations as "strictly antisymmetric".
pdfs.semanticscholar.org
Flaška, V.; Ježek, J.; Kepka, T.; Kortelainen, J. (2007), Transitive Closures of Binary Relations I(PDF), Prague: School of Mathematics - Physics Charles University, p.1, S2CID47676001, archived from the original(PDF) on 2018-04-06, Lemma 1.1 (iv). Note that this source refers to asymmetric relations as "strictly antisymmetric".
Flaška, V.; Ježek, J.; Kepka, T.; Kortelainen, J. (2007), Transitive Closures of Binary Relations I(PDF), Prague: School of Mathematics - Physics Charles University, p.1, S2CID47676001, archived from the original(PDF) on 2018-04-06, Lemma 1.1 (iv). Note that this source refers to asymmetric relations as "strictly antisymmetric".