Piepiora, P., Petre, L., Witkowski, K. Julkaisussa Archives of Budo (2021) “...karate...”
Piepiora, P., Bagiñska, J., Jaœkowska, K., Witkowski, K. Julkaisussa Archives of Budo (2022) “...karate...”
Piepiora, P., Reguli, Z., Witkowski, K., Maœliñski, J., Dzióba, N., Piepiora, Z. Julkaisussa Archives of Budo (2022) “...karate...”
Piepiora, P., Komarnicka, N., Gumienna, R., Maslinski, J. Julkaisussa Ido Movement for Culture. Journal of Martial Arts Anthropology (2022) “...karate...”
Piepiora, P., Petecka, A. Julkaisussa Ido Movement for Culture. Journal of Martial Arts Anthropology (2020) “...karate...”
Piepiora, P., Witkowski, K., Migasiewicz, J. Julkaisussa Journal of Combat Sports and Martial Arts (2017) “...karate...”