Palov I., Stoilova A, Sirakov K, and Zahariev S. “POSSIBILITIES FOR INCREASING THE YIELDS AFTER PRE-SOWING ELECTRIC TREATMENT OF WHEAT AND MAIZE SEEDS”. World Science, Vol. 3, no. 3(7), Mar. 2016, pp. 6-13, https://rsglobal.pl/index.php/ws/article/view/1038.