1. The effect of correlated exponential service times on single server tandem queues;Mitchell;Naval Res. Logist. Quart.,1977
2. A characterisation of the exponential distribution and a bivariate exponential distribution;Paulson;Sankhyā,1973
3. Stochastic Modeling and the Theory of Queues;Wolff,1989
4. Commutative tandem queue with correlated two servers;Nishida;Math. Japonica,1979
5. A multivariate exponential distribution;Marshall;J. Am. Statist. Assoc.,1967