Analysis of MAP, PH2OA/PH1I, PH2O/1 retrial queue with vacation, feedback, two-way communication and impatient customers. - G. Ayyappan; R. Gowthami (Soft Comput., 2021)

A MAP/PH1, PH2/1 system with two types of heterogeneous service, setup, closedown, vacation, immediate feedback, breakdown and repair. - G. Ayyappan; R. Gowthami (Int. J. Math. Oper. Res., 2022)