@article{INTD_1989_36_a3,
     author = {A. S. Holevo},
     title = {Conditionally positive-definite functions in quantum probability theory},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya},
     pages = {103--147},
     publisher = {mathdoc},
     volume = {36},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTD_1989_36_a3/}
}