1. Kalanchoe ‘Vivien’;Bischofberger;Sedum Society Newsletter,2015
2. Setswana—animals and plants (Setswana—Ditshedi le ditlhare);Cole,1995
3. Crassulacean acid metabolism in Zimbabwean succulents;Heyes;Excelsa,1989
4. Wild flowers of Southeast Botswana;Kirby,2013
5. Nitrogen metabolism of detached Kalanchoe leaves in the dark in relation to acidification, deacidification and O2 uptake;Lyndon;Journal of Experimental Botany,1962