http://www.thetimes.co.uk/article/five-chechens-in-court-for-murder-of-putin-critic-hf2cp7fmd
https://www.gazeta.ru/comments/column/kolesnikov/10229081.shtml
https://www.gazeta.ru/army/2016/10/04/10229405.shtml
http://www.rbc.ru/newspaper/2016/10/04/57f272ee9a7947c2d867efdb
http://nv.ua/opinion/oreshkin/chem-konchitsja-dlja-putina-igra-v-plohogo-malchika-236102.html
http://www.levada.ru/2016/10/04/oktyabrskij-putch-1993-goda/