ONWUBIKO, N.C. et al. 2020. Pattern of variation and grouping of qualitative morphological characters of bambara groundnut (Vigna subterranea (L.) Verdc.). Acta agriculturae Slovenica. 115, 2 (Jun. 2020), 437–447. DOI:https://doi.org/10.14720/aas.2020.115.2.1283.