Proc. of an Internat. Symp. on aromatic plants organized by the Laboratory of Ecology, Univ. of Thessaloniki. Held in Kallithea (Chalkidiki) Greece, 14-19 September 1981
(1982)
Morphology, pollination and pollinators, ecology, phytogeography, hybridisation, keys and a systematic treatment of all African species : with a note on collecting and cultivation
(1980)