@article{MASLO_1996__46_2-3_a3,
     author = {Chung, Pham Van},
     title = {Multiplicative functions satisfying the equation $f(m\sp 2+n\sp 2)=f(m\sp 2)+f(n\sp 2)$},
     journal = {Mathematica slovaca},
     pages = {165--171},
     publisher = {mathdoc},
     volume = {46},
     number = {2-3},
     year = {1996},
     mrnumber = {1427001},
     zbl = {0888.11004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1996__46_2-3_a3/}
}