@article{UMJ_2023_9_2_a4,
     author = {Kothandaraman Divya and Kandaiyan Indhira},
     title = {Heterogeneous server retrial queueing model with feedback and working vacation using artificial bee colony optimization algorithm},
     journal = {Ural mathematical journal},
     pages = {60--76},
     year = {2023},
     volume = {9},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UMJ_2023_9_2_a4/}
}