@article{CM_1951__9__1_0,
     author = {Van Herk, C. G. G.},
     title = {A class of completely monotonic functions},
     journal = {Compositio Mathematica},
     pages = {1--79},
     publisher = {Kraus Reprint},
     volume = {9},
     year = {1951},
     mrnumber = {41181},
     zbl = {0042.34302},
     language = {en},
     url = {http://www.numdam.org/item/CM_1951__9__1_0/}
}