Pryvedeniuk, N. “Valeriana Officinalis Yield With a Drip Irrigation System under Conditions of Left-Bank Forest-Steppe of Ukraine”. Land Reclamation and Water Management, Vol. 104, no. 2, Nov. 2016, pp. 72 -76, http://mivg.iwpim.com.ua/index.php/mivg/article/view/60.