Muhammad Shahid and  Nasir-uddin Khan and  Mushtaq Hussain and  Muhammad Liaquat Ali and  Asif Mansoor,  Vaccinated Susceptible Infected and Recovered (VSIR) Mathematical Model to Study the Effect of Bacillus Calmette-Guerin (BCG) Vaccine and the Disease Stability Analysis.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2015, vol. 98(2). 122 - 126
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10001826.