@article{1256050924,
author = {Glick, Noel},
title = {Perturbation of a self adjoint differential operator},
journal = {Illinois J. Math.},
volume = {19},
number = {4},
year = {1975},
pages = { 71-76},
language = {en},
url = {http://dml.mathdoc.fr/item/1256050924}
}
Glick, Noel. Perturbation of a self adjoint differential operator. Illinois J. Math., Tome 19 (1975) no. 4, pp. 71-76. http://gdmltest.u-ga.fr/item/1256050924/