Pandey, M. K., D. K. Gangeshwer, and T. L. Verma. “Application of \(G_k/G_d/1\) Queuing Model to Patient Flow at Hospital”. Communications in Mathematics and Applications, vol. 12, no. 3, Sept. 2021, pp. 645-53, doi:10.26713/cma.v12i3.1530.