@article{AM2_1988__36_2-3_137272,
     author = {Shigeru Haruki},
     title = {On the general solution of a nonsymmetric partial difference functional equation analogous to the wave equation.},
     journal = {Aequationes mathematicae},
     pages = {20--31},
     publisher = {mathdoc},
     volume = {36},
     number = {2-3},
     year = {1988},
     zbl = {0651.39001},
     url = {http://geodesic.mathdoc.fr/item/AM2_1988__36_2-3_137272/}
}