ŠMARDA, Petr, Jochen MÜLLER, Jan VRÁNA and Kateřina KOČÍ. Ploidy level variability of some Central European fescues (Festuca subg. Festuca, Poaceae).
Biológia : journal of the Slovak academy of sciences : section botany. Bratislava: Slovak Academy of Sciences, 2005, vol. 60, No 1, p. 25-36. ISSN 1335-6372.