Yan Su 0003 Junping Li Yanyun Li Optimality of admission control in a repairable queue. 202-207 2019 47 Oper. Res. Lett. 3 https://doi.org/10.1016/j.orl.2019.03.011 https://www.wikidata.org/entity/Q128205835 db/journals/orl/orl47.html#SuLL19