Krishna, Gopal, et al. “<i>Hoya edeni< I> (Apocynaceae: Asclepiadoideae): Notes on Its Overlooked First Drawing, Original Material at CAL and Etymology”. Nelumbo, vol. 62, no. 2, Dec. 2020, pp. 192-6, doi:10.20324/nelumbo/v62/2020/156896.