9,285 Siti Sarah Binti Mohd Sinin 1943-08-20 https://pubs.acs.org/doi/pdf/10.1021/jf00109a010 De Lumen, B. O., & Fiad, S. (1982). Tocopherols of winged bean (Psophocarpus tetragonolobus) oil. Journal of Agricultural and Food Chemistry, 30(1), 50-53. The data was extracted from abstract with limited information.