1. Kalina RM, Barczyński BJ. Long way to the Czestochowa Declarations 2015: HMA against MMA. In: Kalina RM, ed. Proceedings of the 1st World Congress on Health and Martial Arts in Interdisciplinary Approach, HMA 2015, 17-19 September 2015, Czestochowa, Poland. Warsaw: Archives of Budo; 2015:1-11.
2. Gorn EJ. The Manly Art: Bare-Knuckle Prize Fighting in America. Ithaca and London: Cornell University Press; 2010.
3. Mixed martial arts and boxing should be banned, says BMA
4. Head injury in mixed martial arts: a review of epidemiology, affected brain structures and risks of cognitive decline
5. Injuries in martial arts and combat sports - a comparative study;Cynarski WJ;Arch Budo,2008