51. Smith H. R., Scotland S. M., Rowe B. W.: Genetics of Escherichia coli virulence, red. Sussman M.: The virulence of Escherichia coli. Acad. Press, New York-London 1985.
52. Smith H. W., Green P. Parsell Z.: J. gen. Microbiol. 129, 3121, 1983.
53. Sojka W. J., Carnaghan R. B. A.: Res. vet. Sci. 2, 340, 1961.
54. Stamm W. E. i in.: J. infect. Dis. 159, 400, 1989.
55. Stevenson P., Griffithe E. W.: Growth of Escherichia coli under Iron-restricted conditions, red. Sussman M., w: The virulence of Escherichia coli. Acad. Press, New York-London 1985.
56. Suwanichkul A., Panigrahy B.: Avian Dis. 32, 822, 1988.
57. Taylor P. W.: Measurement of the bacteriocid Activity of Serum, red. Sussman M., w: The virulence of Escherchia coli, Acad. Press New York-London 1985.
58. Truscott R. B.: Can. J. comp. Med. 37, 375, 1973.
59. Tsui T. i in.: FEMS Microbiol. Lett. 52, 79, 1988.
60. Tsui T. i in.: FEMS Microbiol. Lett. 67, 329, 1990.
61. Vidotto M. C. i in.: Avian Dis. 34, 531, 1990.
62. Vidotto M. C. i in.: Braz. J. Med, Biol. Res. 24, 677, 1991.
63. Whittam T. S., Wilson R. A.: Infect Immun. 56, 2458, 1988.