@article{01086037,
title = {Relative boundedness and compactness theory for second-order differential operators.},
journal = {Journal of Inequalities and Applications [electronic only]},
volume = {1},
year = {1997},
pages = {375-400},
doi = {10.1155/S1025583497000271},
zbl = {0891.34062},
language = {en},
url = {http://dml.mathdoc.fr/item/01086037}
}
Anderson, Terry G.; Hinton, Don B. Relative boundedness and compactness theory for second-order differential operators.. Journal of Inequalities and Applications [electronic only], Tome 1 (1997) pp. 375-400. doi : 10.1155/S1025583497000271. http://gdmltest.u-ga.fr/item/01086037/