@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/