Asanova, G.K., et al. “The Study of Ontogenesis of Centaurea Bipinnatifida (Trautv.) Tzvel. in the Condition of the City of Karaganda”. Fundamental and Experimental Biology, vol. 97, no. 1, Mar. 2020, pp. 15-21, doi:10.31489/2020bmg1/15-21.