Protopopova, V. V. ., Y. P. Didukh, V. S. Tkachenko, M. V. Shevera, O. Kucher, L. V. Zavialova, in A. P. Biatov. „Grindelia Squarrosa (Pursh) Dunal in Ukraine: Current Distribution and Ecological and Coenotic Peculiarities“. Hacquetia, let. 20, št. 2, april 2021, str. 263–272, doi:10.2478/hacq-2021-0014.