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A MATRIX-MULTIPLICATIVE SOLUTION FOR A SINGLE-LINE SYSTEM WITH SERVER VACATIONS, A FINITE RETRIAL QUEUE, AND PHASE-TYPE DISTRIBUTIONS Article Atencia I.M., Bocharov P.P., Puzikova D.A. Automation and Remote Control. Maik Nauka Publishing / Springer SBM. Vol. 60. 1999. P. 1273-1289