1. Beeuwkes, H. 1949. Ned. Tijdschr. v. Geneesk.93, 3319.
2. Borel, L. J. 1952. Pleuropneumonia et bactéries en phase “L”. Thesis, Paris.
3. Durel, P., Roiron-Ratner, A., Siboulet, A. andSorel, Cl. 1954. Bull. Acad. Nat. Med. 3me Serie138, 65.
4. Edward, D. G.ff. andFitzgerald, W.A. 1954. J. path. bact.68, 23.
5. Freundt, E. A. 1953. Acta path. micr. scand.32, 468.