30 July 2015. ↑ Carol, Oliver (1 September 2018), "Pro-Russian rebel leader Alexander Zakharchenko killed in explosion, several separatist commanders in eastern Ukraine have met their end in suspicious circumstances", The Independent, retrieved 2 September 2018 1 2 Matveeva, Anna (2017), Through times of trouble, conflict in Southeastern Ukraine explained from within, Lexington Books, p. 103, ISBN 978-1498543231 ↑ "Separatists tighten grip on east Ukraine, EU agrees more sanctions on Moscow".