J. B. Fernandes, J. S. de Holanda, N. A. de Souza, and M. C. M. das Chagas, “Environmental adaptability and virus incidence in cowpea cultivars in Rio Grande do Norte, Brazil”, PAB, vol. 28, no. 1, pp. 33–37, Jan. 1993, doi: 10.1590/S1678-3921.pab1993.v28.3859.