Sultangazina, G., Kuprijanov А., Kuprijanov О., и R. Beyshov. «ONTOGENESIS AND AGE STRUCTURE OF ADONIS VERNALIS L. POPULATIONS IN THE CONDITIONS OF NORTHERN KAZAKHSTAN». «Вестник НАН РК», вып. 5, октябрь 2020 г., сс. 56-64, http://89.250.84.46/bulletin-science/article/view/771.