@article{01019504,
title = {One-dimensional graph perturbations of selfadjoint relations.},
journal = {Annales Academiae Scientiarum Fennicae. Mathematica},
volume = {22},
year = {1997},
pages = {123-164},
zbl = {0894.47021},
language = {en},
url = {http://dml.mathdoc.fr/item/01019504}
}
Hassi, Seppo; de Snoo, Henk. One-dimensional graph perturbations of selfadjoint relations.. Annales Academiae Scientiarum Fennicae. Mathematica, Tome 22 (1997) pp. 123-164. http://gdmltest.u-ga.fr/item/01019504/