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2. The bacterial nodules of the Rubiaceae;Boodle;Kew Bull.,1923
3. A revision of the South African species of Pavetta;Bremekamp;Ann. Transv. Mus.,1929
4. A monograph of the genus Pavetta L;Bremekamp;Reprium nov. Spec. Regni Veg.,1934
5. On the position of Platycarpum Humb. et Bonpl., Henriquezia Spruce ex Benth. and Gleasonia Standi;Bremekamp;Acta bot. neerl.,1957