Palhares, L. R., Bruzi, A. T., Lage, G. M., Fialho, J. V. A. P., Ugrinowitsch, H. and Benda, R. N. (2006) “Effects of relative frequency and delay interval of knowledge of results (KR) in the acquisition of motor skills”, Brazilian Journal of Motor Behavior, 1(1), pp. 53–63. doi: 10.20338/bjmb.v1i1.7.