van Welzen, P. C. 2012. “FIVE RARE GENERA OF EUPHORBIACEAE (SENSU LATO) IN THE MALAY ARCHIPELAGO: ALPHANDIA, ASHTONIA, BORNEODENDRON, CLADOGYNOS AND TAPOÏDES”. Edinburgh Journal of Botany 69 (3): 389-411. https://doi.org/10.1017/S0960428612000248.