Lye (Böckeler) 1888 - Lye KA (1983) Studies in African Cyperaceae 25. New taxa and combinations in Cyperus L. Nordic Journal of Botany 3(2): 213-232. doi: 10.1111/j.1756-1051.1983.tb01069.x.
There is no corrections for Cyperus laxus subsp. buchholzii yet.