@article{05696818,
title = {Characterizations of nonnegative selfadjoint extensions.},
journal = {Acta Universitatis Apulensis. Mathematics - Informatics},
volume = {15},
year = {2008},
pages = {397-404},
zbl = {1199.47012},
language = {en},
url = {http://dml.mathdoc.fr/item/05696818}
}
Sandovici, Adrian. Characterizations of nonnegative selfadjoint extensions.. Acta Universitatis Apulensis. Mathematics - Informatics, Tome 15 (2008) pp. 397-404. http://gdmltest.u-ga.fr/item/05696818/