@article{02097232,
title = {The distance from a point to a cone in a Hilbert space.},
journal = {Vladikavkazski\u\i\ Matematicheski\u\i\ Zhurnal},
volume = {1},
year = {1999},
pages = {40-44},
zbl = {1051.46503},
language = {en},
url = {http://dml.mathdoc.fr/item/02097232}
}
Khudalov, V.T. The distance from a point to a cone in a Hilbert space.. Vladikavkazskiĭ Matematicheskiĭ Zhurnal, Tome 1 (1999) pp. 40-44. http://gdmltest.u-ga.fr/item/02097232/