An inventory system with two heterogeneous servers and orbital search for feedback customers. - C. Suganya; M. Amirthakodi; B. Sivakumar (Int. J. Math. Model. Numer. Optimisation, 2018)

MAP/PH(1), PH(2)/2 finite retrial inventory system with service facility, multiple vacations for servers. - C. Suganya; B. Sivakumar (Int. J. Math. Oper. Res., 2019)