An M/G/1 retrial queueing system with two phases of service subject to the server breakdown and repair. - Gautam Choudhury; Kandarpa Deka (Perform. Evaluation, 2008)

An MX/G/1 unreliable retrial queue with two phases of service and Bernoulli admission mechanism. - Gautam Choudhury; Kandarpa Deka (Appl. Math. Comput., 2009)

A batch arrival retrial queueing system with two phases of service and service interruption. - Gautam Choudhury; Lotfi Tadj; Kandarpa Deka (Comput. Math. Appl., 2010)