@article{AFM_2002_27_2_a13,
     author = {Horst Alzer and Christian Berg},
     title = {Some classes of completely monotonic functions},
     journal = {Annales Fennici Mathematici},
     pages = {445--460},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2002_27_2_a13/}
}