Vieira, Roberval Daiton, Ney Nielsen, Nelson Moreira de Carvalho, and Euclides Braga Malheiros. 2014. “Physiological Maturity of Pigeonpea at Three Sowing Periods”. Pesquisa Agropecuaria Brasileira 24 (7): 873-78. https://doi.org/10.1590/S1678-3921.pab1989.v24.16047.