@article{AM2_1981__23_136914,
     author = {John Lawrence},
     title = {The {Shannon} kernel of a non-negative information function.},
     journal = {Aequationes mathematicae},
     pages = {233--235},
     publisher = {mathdoc},
     volume = {23},
     year = {1981},
     zbl = {0529.94005},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__23_136914/}
}