@article{MS2_1953__1_165503,
     author = {Einar HILLE},
     title = {Some extremal properties of {Laplace} transforms .},
     journal = {Mathematica Scandinavica},
     pages = {227--236},
     publisher = {mathdoc},
     volume = {1},
     year = {1953},
     zbl = {0051.33503},
     url = {http://geodesic.mathdoc.fr/item/MS2_1953__1_165503/}
}