@article{AM2_1986__31_137156,
     author = {H. Haruki},
     title = {A new characterization of {Euler's} gamma function by a functional equation.},
     journal = {Aequationes mathematicae},
     pages = {173--183},
     publisher = {mathdoc},
     volume = {31},
     year = {1986},
     zbl = {0614.33002},
     url = {http://geodesic.mathdoc.fr/item/AM2_1986__31_137156/}
}