@article{AM2_1975__12_136480,
     author = {Halina Swiatak},
     title = {On a {Class} of {Functional} {Equations} with {Several} {Unknown} {Functions.}},
     journal = {Aequationes mathematicae},
     pages = {39--64},
     publisher = {mathdoc},
     volume = {12},
     year = {1975},
     zbl = {0298.39002},
     url = {http://geodesic.mathdoc.fr/item/AM2_1975__12_136480/}
}