Breeding Elite Cowpea [Vigna unguiculata (L.) Walp] Varieties for Improved Food Security and Income in Africa: Opportunities and Challenges - Gomes, Ana Maria Figueira; Nhantumbo, Nascimento; Ferreira-Pinto, Manuela; Massinga, Rafael; Ramalho, José C.; Ribeiro-Barros, Ana I. (2019)