1.
Firek W. Assessment of the quality of instructional support of players by the referee during children’s rugby competitions. In: Kowalska JE, Makarczuk A, Maszorek-Szymala A, Kaźmierczak A, eds. Contemporary Problems of Physical and Health Culture. Lodz University Press; 2022:95-109. doi:10.18778/8220-945-7.07