@article{MAN_1960__140_160788,
     author = {Y. CHEN},
     title = {Theorems of {Asymptotic} {Approximation.}},
     journal = {Mathematische Annalen},
     pages = {360--407},
     publisher = {mathdoc},
     volume = {140},
     year = {1960},
     zbl = {0094.27106},
     url = {http://geodesic.mathdoc.fr/item/MAN_1960__140_160788/}
}