НЕХАЙЧЕНКО, Д. В. “Modular Structure of Inflorescences Hydrangea L.: Flowering and Pollen Quality. D.V. NEKHAYCHENKO”. Vestnik of the Far East Branch of the Russian Academy of Sciences, no. 2, Apr. 2020, pp. 108-14, http://vestnikdvo.ru/index.php/vestnikdvo/article/view/556.