K.  Vollesen, ?Notes on Annonaceae from Tanzania?, Botaniska NotiserBotaniska Notiser, vol. 133, pp. 53-62, 1980.

K.  Vollesen, ?A new species of Polyalthia (Annonaceae) from Mozambique?, Botaniska NotiserBotaniska Notiser, vol. 133, pp. 53-62, 1980.