@article{10_4153_CMB_1979_030_x,
     author = {Al-Salam, Nadhla A. and Al-Salam, Waleed A.},
     title = {On a {Functional} {Equation}},
     journal = {Canadian mathematical bulletin},
     pages = {235--237},
     year = {1979},
     volume = {22},
     number = {2},
     doi = {10.4153/CMB-1979-030-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1979-030-x/}
}