R. Sathiyamoorthi, G. Malarvizhi, R. K. A. T. “A Stochastic Model for Mean Time to Seroconversion of HIV Transmission With Change of Threshold Under Correlated Intercontact Times”. Recent Research in Science and Technology, vol. 1, no. 6, Dec. 2009, https://updatepublishing.com/journal/index.php/rrst/article/view/329.