@article{MET_1985__32_176004,
     author = {M. Ahsanullah},
     title = {Some {Characterizations} of the {Bivariate} {Normal} {Distribution.}},
     journal = {Metrika},
     pages = {215--218},
     publisher = {mathdoc},
     volume = {32},
     year = {1985},
     zbl = {0609.62019},
     url = {http://geodesic.mathdoc.fr/item/MET_1985__32_176004/}
}