Каролінський, Є. О. “Dragonflies (Insecta: Odonata) of the National Nature Park ‘Dvorichanskyi’”. The Journal of V.N.Karazin Kharkiv National University. Series «Biology», Vol. 19, no. 1097, Oct. 2014, pp. 26-29, https://periodicals.karazin.ua/biology/article/view/193.