1. Anderson, R.M. and May, R.M.: Infectious Diseases of Humans. Oxford University Press, Oxford (1991)
2. Arino, J. and van den Driessche, P.: A multi-city epidemic model. Math. Popul. Stud. 10, 175–193 (2003)
3. Arino, J. and van den Driessche, P.: The basic reproducton number in a multi-city compartment model. LNCIS. 294, 135–142 (2003)
4. Berman, A. and Plemmons, R.J.: Nonnegative Matrices in the Mathematical Sciences. Academic, New York (1979)
5. Chin, J.: Control of Communicable Diseases Manual. 17th Edition. American Public Health Association, Washington (2000)