1. New South Wales Haworthia Study Group: Haworthia nortieri, G. G. Smith. N.S.W.H.S.G. 33;Anonymous;Cact. Succ. J. (New South Wales),1974
2. Jodrellia, a New Genus of Liliaceae from Tropical Africa
3. A contribution to the study of leaf anatomy of the genus Kniphofia Moench (Liliaceae);Baijnath H.;Linn. Soc. Symp. Ser.,1980
4. Changes in the genus Haworthia Duval;Bayer M. B.;Cact. Succ. J. (Los Angeles),1971
5. Reinstatement of the genera Astroloba and Poellnitzia Uitew. (Liliaceae–Aloineae);Bayer M. B.;Natl. Cact. Succ. J.,1972