Walckiers, D., Stroobant, A., Yourassowsky, E., Lion, J., & Cornelis, R. (1991). A sentinel network of microbiological laboratories as a tool for surveillance of infectious diseases in Belgium. Cambridge University Press.

Walckiers, D., A. Stroobant, E. Yourassowsky, J. Lion, et R. Cornelis. A Sentinel Network of Microbiological Laboratories As a Tool for Surveillance of Infectious Diseases in Belgium. Cambridge University Press, 1991.

Walckiers, D., et al. A Sentinel Network of Microbiological Laboratories As a Tool for Surveillance of Infectious Diseases in Belgium. Cambridge University Press, 1991.