Yaseen, Q. B., Petracheva, I. V., Kotov, Y. N., Eltibi, R. S. A. Veröffentlicht in South African Journal for Research in Sport, Physical Education and Recreation (2021) “...sports equipment...”
Rivilla-Garcia, J., Navarro, F., Grande, I., Ignatova, A. S., Sampedro, J. Veröffentlicht in Serbian Journal of Sports Sciences (2010) “...sports equipment...”