@article {IOPORT.50307282,
    author       = {Jankowski, Tadeusz},
    title        = {Boundary value problems for difference equations with causal operators},
    year         = {2011},
    journal      = {Applied Mathematics and Computation},
    volume       = {218},
    number       = {6},
    pages        = {2549-2557},
    doi          = {10.1016/j.amc.2011.07.072},
    identifier   = {50307282},
}