@article{PIM_1976_N_S_20_34_a22,
     author = {Prem Nath},
     title = {On {Some} {Functional} {Equations} {And} {Their} {Applications}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {191 },
     publisher = {mathdoc},
     volume = {_N_S_20},
     number = {34},
     year = {1976},
     url = {http://geodesic.mathdoc.fr/item/PIM_1976_N_S_20_34_a22/}
}