de Troiani, R., Sánchez, T., Reinaudi, N. and de Ferramola, L. 2004. Optimal sowing dates of three species of grain-bearing amaranth in the semi-arid Argentine Pampa. Spanish Journal of Agricultural Research. 2, 3 (Sep. 2004), 385-391. DOI:https://doi.org/10.5424/sjar/2004023-93.