Green, Thomas A., Stefania Skowron- Markowska, Wojciech Cynarski, Carlos Gutiérrez García, Abel Figueiredo, and Jozef Simenko. 2019. “Qualitative and quantitative methods in the study of martial arts and combat sports: a panel based on personal experiences”. Revista de Artes Marciales Asiáticas 14 (2s):79-83. https://doi.org/10.18002/rama.v14i2s.6048.