1. G. Golub and C. Van Loan,Matrix computations, 3rd. ed., Johns Hopkins University Press, Baltimore, 1996.
2. L. Kaufman,Matrix methods for queuing problems, SIAM J. Sci. Comput.,4(1983), 525–552.
3. J. M. Ortega,Numerical analysis: A second course, Academic Press, New York, 1972.
4. P. Park,A domain decomposition method applied to queuing network problems, Comm. Korean Math. Soc.,10(1995), 735–750.
5. P. Park,Use of an orthogonal projector for accelerating a queuing problem solver, Korean J. Comp. & Appl. Math.,3(1996), 193–204.