1. Practical germination of North American and related orchids - I. Epipactis atrorubens, E. gigantea and E. helleborine;Arditti;Am. Orchid Soc. Bull.,1982
2. A technique for the establishment of mycorrhizal infection in orchid tissue grown in aseptic culture;Beardmore;New Phytol.,1981
3. Shoot tip multiplication of orchid clones, Part II. The status of “meristem” propagation through 1971;Bergman;Am. Hortic.,1972
4. La culture “in vitro” des tissues de tubercules d'Ophrys;Champagnat;C.R. Acad. Sci. Paris Ser. D,1972
5. The development and growth requirements of Dactylorhiza purpurella in asymbiotic cultures;Harvais;Can. J. Bot.,1972