@article{GDZPPN00233948X,
title = {Eigenvalue distributions of some degenerate elliptic operators: an approach via entropy numbers.},
journal = {Mathematische Annalen},
volume = {300},
year = {1994},
pages = {311-340},
zbl = {0804.35097},
url = {http://dml.mathdoc.fr/item/GDZPPN00233948X}
}
Edmunds, D.E.; Triebel, H. Eigenvalue distributions of some degenerate elliptic operators: an approach via entropy numbers.. Mathematische Annalen, Tome 300 (1994) pp. 311-340. http://gdmltest.u-ga.fr/item/GDZPPN00233948X/