Estiasih, T. et al. 2018. Hypoglycemic effect of crude water soluble polysaccharide extracted from tubers of purple and yellow water yam (Dioscorea alata L.) on alloxan-induced hyperglycemia Wistar rats. Progress in Nutrition. 20, 1-S (Aug. 2018), 59–67. DOI:https://doi.org/10.23751/pn.v20i1-S.5322.