Tullus, K., Kühn, I., Orskov, I., Orskov, F., & Möllby, R. (1992). The importance of P and type 1 fimbriae for the persistence of Escherichia coli in the human gut. Cambridge University Press.

Tullus, K., I. Kühn, I. Orskov, F. Orskov, ja R. Möllby. The Importance of P and Type 1 Fimbriae for the Persistence of Escherichia Coli in the Human Gut. Cambridge University Press, 1992.

Tullus, K., et al. The Importance of P and Type 1 Fimbriae for the Persistence of Escherichia Coli in the Human Gut. Cambridge University Press, 1992.