Bill Rogio: US designates Caucasus Emirate leader Doku Umarov a global terrorist.Long War Journal, 25. Juni 2010, abgerufen am 10. Juli 2013: „After Basayev's death in 2006, the Chechen and Caucasus jihadists united under the command of Doku Umarov, one of the last remaining original leaders of the Chechen rebellion and a close associate of al Qaeda.“
Chechnya – Narrative. (PDF) University of Southern California, archiviert vom Original am 2. September 2016; abgerufen am 12. Oktober 2017: „Russian military involvement into the Caucasus started early in the 18th century and in 1785–1791 the first major rebellion in Chechnya against the imperial rule took place.“
Chechnya – Narrative. (PDF) University of Southern California, archiviert vom Original am 2. September 2016; abgerufen am 12. Oktober 2017: „Russian military involvement into the Caucasus started early in the 18th century and in 1785–1791 the first major rebellion in Chechnya against the imperial rule took place.“
