@article{1103038060,
author = {Coddington, Earl A.},
title = {Normal extensions of formally normal operators.},
journal = {Pacific J. Math.},
volume = {10},
number = {4},
year = {1960},
pages = { 1203-1209},
language = {en},
url = {http://dml.mathdoc.fr/item/1103038060}
}
Coddington, Earl A. Normal extensions of formally normal operators.. Pacific J. Math., Tome 10 (1960) no. 4, pp. 1203-1209. http://gdmltest.u-ga.fr/item/1103038060/