@article{AM2_1973__9_136346,
     author = {A. LASOTA},
     title = {Invariant {Measures} and {Functional} {Equations}},
     journal = {Aequationes mathematicae},
     pages = {193--200},
     publisher = {mathdoc},
     volume = {9},
     year = {1973},
     zbl = {0269.28008},
     url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136346/}
}