@article{AM2_1981__23_136919,
     author = {Pham Son},
     title = {Embedding quasi-metric spaces in {Hilbert} space. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {315--317},
     publisher = {mathdoc},
     volume = {23},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__23_136919/}
}