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@Article{15104,
    author = "Adam Kowalewski",
    title  = "Extremal Problems for Second Order Hyperbolic Systems with Time-Varying Delays",
    year   = "2026",
    journal = "Pomiary Automatyka Robotyka",
    month   = "1",
    doi     = "10.14313/PAR_259/5",
    volume  = "30",
    number  = "259",
    pages  = "5-18",
    keywords = "boundary control, electric long line, optimal control, second order hyperbolic system, time-varying delays",
    url  = "https://par.pl/Archiwum/2026/1-2026/Extremal-Problems-for-Second-Order-Hyperbolic-Systems-with-Time-Varying-Delays"
    }