@article{AM2_1986__30_137133,
     author = {Michael Boshernitzan},
     title = {Hardy fields and existence of transexponential functions.},
     journal = {Aequationes mathematicae},
     pages = {258--280},
     publisher = {mathdoc},
     volume = {30},
     year = {1986},
     zbl = {0593.26003},
     url = {http://geodesic.mathdoc.fr/item/AM2_1986__30_137133/}
}