Leonardo, L., and A. J. Scaglia. “Study on Youth Handball Regulations: A Documental Analysis on the Mandatory Use of Individual Defensive System in under-12 and under-14 Competitions”. Journal of Physical Education (Maringá), Vol. 29, no. 1, June 2018, p. e-2952, doi:10.4025/jphyseduc.v29i1.2952.