@article{ZNSL_2018_474_a4,
     author = {E. S. Garai},
     title = {On the convergence of workload in a service system to {Brownian} motion with switching variance},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {77--89},
     year = {2018},
     volume = {474},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2018_474_a4/}
}