Folia facultatis scientiarum naturalium Universitatis Masarykianae Brunensis, Mathematica [Text] / Brno. Masaryk Univ., Fac. of science nature. - Brno : Publ. by Masaryk Univ.
Т. 18 : Geometric structures invariant to symmetries / Jan Gregorovič. - Brno : Publ. by Masaryk Univ., 2012. - 91 p. : tab. (Folia facultatis scientiarum naturalium Universitatis Masarykianae Brunensis Mathematica ; Т. 18). - Бібліогр.: с. 90-91. - ISBN 978-80-210-0010-4