Ismailkhan Enayathulla Khan, Rajendran Paramasivam. “Analysis of Batch Encouraged Arrival Markovian Model Due to a Secondary Optional Service, Break-Down and Numerous Vacations”. Mathematical Statistician and Engineering Applications, vol. 72, no. 1, Jan. 2023, pp. 1166-77, doi:10.17762/msea.v72i1.2213.