Efrosinin, DmitryStepanova, NataliaSztrik, JánosPlank, Andreas2020-10-202020-10-202020Mathematics. -8 : 10 (2020), p. 1-18. -Mathematics. - 2227-73902227-7390http://hdl.handle.net/2437/297084Approximations in Performance Analysis of a Controllable Queueing System with Heterogeneous Serversfolyóiratcikkopen access journalhttp://webpac.lib.unideb.hu:8082/ebib/CorvinaWeb?action=cclfind&resultview=long&ccltext=idno+BIBFORM088719Műszaki tudományokInformatikai tudományokhttps://irh.inf.unideb.hu/~jsztrik/publications/papers/MDPI_mathematics-08-01803_2020.pdfhttp://dx.doi.org/10.3390/math81018032020-10-2100058700880000185093092194