Didukh, Y., I. Vasheniak, and O. Chusova. “Stipo Pulcherrimae-Festucetalia Pallentis Pop 1968 of Calcareous Petrophytic Steppes in Ukraine”.
Hacquetia
, vol. 20, no. 2, Jan. 2021, pp. 303–325, https://ojs.zrc-sazu.si/hacquetia/article/view/8832.