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Boxma O.J. globally gated polling system with server interruptions, and applications to the repairman problem / O.J.Boxma,J.A.Weststrate,U.Yechiali, 1992. - 16 p. - Текст : непосредственный.
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Boxma O.J. Efficient visit frequencies for polling tables:minimizations of waiting cost / O.J.Boxma,H.Levy,J.A.Weststrate, 1990. - 36 p. - Текст : непосредственный.