BioStor
 | British slugs (Pulmonata; Testacellidae, Arionidae, Limacidae) H E Quick (1960) Bull. Brit. Mus. (Nat. Hist.) (Zool.) 6: 103-226 |
 | Generic limits in the tribe Cladothamneae (Ericaceae), and its position in the Rhododendroideae B A Bohm, S W Brim et al. (1978) Journal of the Arnold Arboretum 59: 311-341 |
 | An Analysis of the Flora of Southern Africa: Its Characteristics, Relationships, and Orgins Peter Goldblati (1978) Annals of the Missouri Botanical Garden 65: 369-436 |
 | Composition, Origin, and Affinities of the Madagascan Vascular Flora Jean-F Leroy (1978) Annals of the Missouri Botanical Garden 65: 535-589 |
 | Evidence for the Polyphyly of the Scrophulariaceae Based on Chloroplast rbcL and ndhF Sequences Richard G Olmstead and Patrick A Reeves (1995) Annals of the Missouri Botanical Garden 82: 176-193 |
 | Two new species of Streptocarpus (Gesneriaceae) from South Africa Trevor J Edwards (2003) Novon 13: 185-188 |