@article{MET_1977__24_175717,
     author = {S. Talwalker},
     title = {A {Note} on {Characterization} by the {Conditional} {Expectation.}},
     journal = {Metrika},
     pages = {129--136},
     publisher = {mathdoc},
     volume = {24},
     year = {1977},
     zbl = {0366.62011},
     url = {http://geodesic.mathdoc.fr/item/MET_1977__24_175717/}
}