Castiglioni, V. B. R., de Oliveira, M. F. and Arias, C. A. A. (1999) “Combining ability analysis among inbred lines of sunflower”, Pesquisa Agropecuaria Brasileira, 34(6), pp. 981–988. doi: 10.1590/S1678-3921.pab1999.v34.5280.