Lavrishchev, Anton, Andrey Litvinovich, Vladimir Bure, Olga Pavlova, and Elmira Saljnikov. “Strontium Dynamics in Soil and Assimilation by Plants During Dissolution of Conversion Chalk”. Biological Communications 63, no. 3 (November 30, 2018): 163–173. Accessed May 25, 2019. https://biocomm.spbu.ru/article/view/928.