@article{01332373,
title = {Orthogonal decompositions in Hilbert },
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {67},
year = {1998},
pages = {217-230},
zbl = {0927.46031},
language = {en},
url = {http://dml.mathdoc.fr/item/01332373}
}
Popovici, D. Orthogonal decompositions in Hilbert . Acta Mathematica Universitatis Comenianae. New Series, Tome 67 (1998) pp. 217-230. http://gdmltest.u-ga.fr/item/01332373/