Purcino, H.M., Purcino, A.A. and Lynd, J.Q. (2014) “Soil fertility effects governing growth and nodule parameters at anthesis of two winged bean cultivars with a typic eutrustox”, Pesquisa Agropecuaria Brasileira, 16(5), pp. 633–644. doi:10.1590/S1678-3921.pab1981.v16.17042.