Rassokha, S.N., and S.N. Rassokha. “Influence of Physiologically Active Compounds of the Rizospheric Soil under Species of Echinacea Moench. On Citophysiological Processes in Pea Plant Cells”. Plant Introduction 33 (March 1, 2007): 87-93. Accessed September 16, 2024. http://plantintroduction.org/index.php/pi/article/view/831.