Levine, M. M., Kotloff, K. L., Barry, E. M., Pasetti, M. F., & Sztein, M. B. (2007). Clinical trials of Shigella vaccines: Two steps forward and one step back on a long, hard road.

Levine, Myron M., Karen L. Kotloff, Eileen M. Barry, Marcela F. Pasetti, و Marcelo B. Sztein. Clinical Trials of Shigella Vaccines: Two Steps Forward and One Step Back On a Long, Hard Road. 2007.

Levine, Myron M., et al. Clinical Trials of Shigella Vaccines: Two Steps Forward and One Step Back On a Long, Hard Road. 2007.