1. Observations on the root endophyte Rhizophagus in culture;Barrett;Phytopathology,1947
2. Synthesis of mycorrhiza with pure cultures of Rhizophagus;Barrett;Phytopathology,1958
3. Biological stimulation in germination;Brown;Nature, Lond.,1946
4. The occurrences and systematic position of the vesicular-arbuscular type of mycorrhizal fungi;Butler;Trans. Brit. mycol. Soc.,1939
5. Le ‘Rhizophagus populinus Dangeard’;Dangeard;Botaniste, ser. vii,1900