Amezcua, R., Friendship, R. M., & Dewey, C. E. (2008). An investigation of the presence of Escherichia coli O149: K91:F4 on pig farms in southern Ontario and the use of antimicrobials and risk factors associated with the presence of this serogroup. Canadian Veterinary Medical Association.

Amezcua, Rocio, Robert M. Friendship, و Catherine E. Dewey. An Investigation of the Presence of Escherichia Coli O149: K91:F4 On Pig Farms in Southern Ontario and the Use of Antimicrobials and Risk Factors Associated With the Presence of This Serogroup. Canadian Veterinary Medical Association, 2008.

Amezcua, Rocio, Robert M. Friendship, و Catherine E. Dewey. An Investigation of the Presence of Escherichia Coli O149: K91:F4 On Pig Farms in Southern Ontario and the Use of Antimicrobials and Risk Factors Associated With the Presence of This Serogroup. Canadian Veterinary Medical Association, 2008.