Walker, M. J., Rohde, M., Timmis, K. N., & Guzmán, C. A. (1992). Specific lung mucosal and systemic immune responses after oral immunization of mice with Salmonella typhimurium aroA, Salmonella typhi Ty21a, and invasive Escherichia coli expressing recombinant pertussis toxin S1 subunit.

Walker, M J., M. Rohde, K N. Timmis, und C A. Guzmán. Specific Lung Mucosal and Systemic Immune Responses After Oral Immunization of Mice With Salmonella Typhimurium AroA, Salmonella Typhi Ty21a, and Invasive Escherichia Coli Expressing Recombinant Pertussis Toxin S1 Subunit. 1992.

Walker, M J., M. Rohde, K N. Timmis, und C A. Guzmán. Specific Lung Mucosal and Systemic Immune Responses After Oral Immunization of Mice With Salmonella Typhimurium AroA, Salmonella Typhi Ty21a, and Invasive Escherichia Coli Expressing Recombinant Pertussis Toxin S1 Subunit. 1992.