Shkolna, I. I., I. V. Tarasova, V. V. Markevych, V. O. Petrashenko, M. P. Zagorodnii, and O. V. Hordienko. “Content and Balance of Trace Elements in Placenta on Different Stages of Gestation”. Zaporozhye Medical Journal, vol. 19, no. 1, Feb. 2017, doi:10.14739/2310-1210.2017.1.91708.