1. Das SEP-agent;Bakos;Proc. XVII. Int. Vet. Congr. Hannover,1963
2. Die Kultivierung des SEP-agents im Dottersack des Bruteies;Dinter;Zbl. Vet. Med.,1957
3. a: Isolation of SEP agent from pigs with enzootic pneumonia in Finland;Estola;Acta path. et microbiol. scandin.,1966
4. b: Thermal Inactivation of the SEP-agent at various Temperatures;Estola;Nord. Vet. Med.,1966
5. Mycoplasma hyorhinis a causative Agent of Pig Pneumonia;Gois;Zbl. Vet. Med. B,1968