* Riggs RD, Hamblen ML (1962) Soybean-cyst nematode host studies in the family Leguminosae. Report Series 110. Agricultural Experiment Station. University of Arkansas, Fayetteville (US), 18 pp.
------- Host range experiments.
* Pfenning LH, Pereira de Melo M, Moreira Costa M, Reis A, Santos Cabral C, Lima CS, Abreu LM, Costa SS (2019) Fusarium udum revisited: a common, but poorly understood member of the Fusarium fujikuroi species complex. Mycological Progress 18, 107–117. https://doi.org/10.1007/s11557-018-1446-x
------- Confirmed host.
* Lima E A, Mattos J K, Moita A W, Carneiro R G & Carneiro R M D G (2009) Host status of different crops for Meloidogyne ethiopica control. Tropical Plant Pathology 34, 152-157.
-------As Crotalaria okoelvka. In experiments, it was found to be 'Moderatly resistant' (but with RF >= 1)