@article{1077374667,
author = {Gilbert, Richard C. and Kramer, Vernon A.},
title = {Trace formulas for a perturbed operator},
journal = {Duke Math. J.},
volume = {30},
number = {1},
year = {1963},
pages = { 275-296},
language = {en},
url = {http://dml.mathdoc.fr/item/1077374667}
}
Gilbert, Richard C.; Kramer, Vernon A. Trace formulas for a perturbed operator. Duke Math. J., Tome 30 (1963) no. 1, pp. 275-296. http://gdmltest.u-ga.fr/item/1077374667/