ŠPARL, Primož, 2018, On structural results of tetravalent half-arc-transitive graphs. V : International Workshop on Symmetries of Graph and Networks, January 29-February 2, 2018, Sanya, China [na spletu]. Objavljeni povzetek znanstvenega prispevka na konferenci (vabljeno predavanje). S. l. 2018. p. 12–13. [Dostopano 8 april 2025]. Pridobljeno s: http://www.tsimf.cn/meeting/show?id=83#MMM4
