Ortiz, O. G. B., Caballero, S. U. and Alvarez, A. L. (2014) “Influence of application time of 32-P labelled triple superphosphate on the fertilizer use efficiency and productivity of potato”, Pesquisa Agropecuaria Brasileira, 23(9), pp. 963–970. doi: 10.1590/S1678-3921.pab1988.v23.14020.