@article{MZM_1991_49_6_a16,
     author = {V. P. Belavkin},
     title = {A~pseudo-Euclidean representation of conditionally positive mappings},
     journal = {Matemati\v{c}eskie zametki},
     pages = {135--137},
     publisher = {mathdoc},
     volume = {49},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_49_6_a16/}
}