1. Beginning a genetic analysis of conjugational transfer determined by the F factor in Escherichia coli by isolation and characterization of transfer-deficient mutants;Achtman;J. Bacteriol.,1971
2. Neonatal infections in puppies caused by Escherichia coli serogroups O4 and O25;Askaa;Nord. Vet. Med.,1978
3. Orale, aktive Immunisierung neugeborener Ferkel gegen Escherichia coli: Wirkungsnachweis im Darmligaturtest;Baljer;Zbl. Vet. Med.,1975
4. Nachweis von enterotoxinbildenden E. coli Stämmen (ETEC) bei Hunden mit akuter Gastroenteritis;Baljer;Prakt. Tierarzt.,1986
5. Characterization of hemolytic strains of Escherichia coli belonging to classical to classical enteropathogenic O-serogroups;Beutin;Zbl. Bakt. Hyg.,1986