Affine regular decagons in GS-quasigroup. Volenec, V.; Kolar-Begović, Z. — 2008 Commentationes Mathematicae Universitatis Carolinae
Symmedians and the symmedian center of the triangle in an isotropic plane. Kolar-Begović, Z.; Kolar-Šuper, R.; Beban-Brkić, J.; Volenec, V. — 2006 Mathematica Pannonica