1. Anselmio E. 1933:Die Stammpflanzen von Muirapuama. Diss. Berlin‐Dahlem.
2. Studies in root‐parasitism. The haustorium of Santalum album. I. Early stages, up to penetration;Barber C. A.;Mem. Dept. Agric. India, Bot. Ser.,1906
3. Ibid. 2. The structure of the mature haustorium and the inter‐relations between host and parasite;Barber C. A.;Idem,1907
4. Ibid. 4. The haustorium of Cansjera rheedii.;Barber C. A.;Idem.,1908
5. Root parasitism in Exocarpus, with comparative notes on the haustoria of Thesium.;Benson M.;Ann. Bot.,1910