Authors: Sumita, Ushio Masuda, Yasushi

Citation: Sumita, Ushio et Masuda, Yasushi, Classes of probability density functions having Laplace transforms with negative zeros and poles, Advances in applied probability , 19(3), 1987, pp. 632-651

Authors: Sumita, Ushio Shanthikumar, J. George

Citation: Sumita, Ushio et Shanthikumar, J. George, An age-dependent counting process generated from a renewal process, Advances in applied probability , 20(4), 1988, pp. 739-755

Authors: Sumita, Ushio Masuda, Yasushi

Citation: Sumita, Ushio et Masuda, Yasushi, Analysis of a counting process associated with a semi-Markov process: number of entries into a subset of state space, Advances in applied probability , 19(4), 1987, pp. 767-783