F. Z. Filimban, B. Mackinder, S. G. Knees, and R. T. Pennington, “STUDIES IN THE FLORA OF ARABIA: XXX. A SYNOPSIS OF THE NATIVE AND NATURALISED SPECIES OF SENNA (LEGUMINOSAE: CAESALPINIOIDEAE) IN THE ARABIAN PENINSULA”, Edinburgh J. Bot., vol. 71, no. 1, pp. 117–132, Feb. 2014, doi: 10.1017/S0960428613000334.