Saranga, S., Nhantumbo, L., Fermino, R. C., Prista, A., Seabra, A., & Maia, J. A. R. (2010). Sibling clustering in physical fitness: a study in Calanga, a rural region of Mozambique . Brazilian Journal of Physical Education and Sport, 24(3), 363-372. https://doi.org/10.1590/S1807-55092010000300007