@article{GDZPPN002442086,
title = {On the point spectrum of self-adjoint extensions.},
journal = {Mathematische Zeitschrift},
volume = {212},
year = {1993},
pages = {343-356},
zbl = {0791.47005},
url = {http://dml.mathdoc.fr/item/GDZPPN002442086}
}
Weidmann, J.; Brasche, J.; Neidhardt, H. On the point spectrum of self-adjoint extensions.. Mathematische Zeitschrift, Tome 212 (1993) pp. 343-356. http://gdmltest.u-ga.fr/item/GDZPPN002442086/