Talpur, M.G.H. and Ilyas, R.M. 2006. The Marginal Distributions of a Crossing Time and Renewal Numbers Related with Two Poisson Processes are as Ph-Distributions. Pakistan Journal of Statistics and Operation Research. 2, 1 (Jan. 2006), 27-34. DOI:https://doi.org/10.18187/pjsor.v2i1.83.