Olenich, I., I. Khariv, B. Gutyj, and I. Smolynets. “THE STRATEGY AND TACTICS OF PHARMACEUTICAL MARKETING”. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series Economical Sciences, Vol. 17, no. 4, Mar. 2015, pp. 310-4, https://nvlvet.com.ua/index.php/economy/article/view/3387.