Лещук, Н.В., Панькова, І.М. and Стефківська, Ю.Л. 2018. Economic and bioenergy evaluation of lettuce (Lactuca sativa L.) seed production efficiency in the conditions of Ukrainian Polissia. Plant varieties studying and protection. 14, 3 (Oct. 2018), 328–334. DOI:https://doi.org/10.21498/2518-1017.14.3.2018.145313.