Tadeusz Ambroży, Mateusz Nowak, Dariusz Mucha, Wiesław Chwała, Juliusz Piwowarski, Lothar Sieber, The influence of an original training programme on the general physical fitness of ju-jitsu trainees, Ido Movement for Culture : journal of martial arts anthropology : theory of culture, psychophysical culture, cultural tourism, anthropology of martial arts, combat sports, 2014, 14, 4, s. 69-76