@article{02168657, title = {Sobolev space estimates for solutions of the equation }, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2004}, year = {2004}, pages = {969-974}, doi = {10.1155/S0161171204308197}, zbl = {1077.32020}, language = {en}, url = {http://dml.mathdoc.fr/item/02168657} }
Darko, Patrick W.; Lutterodt, Clement H. Sobolev space estimates for solutions of the equation . International Journal of Mathematics and Mathematical Sciences, Tome 2004 (2004) pp. 969-974. doi : 10.1155/S0161171204308197. http://gdmltest.u-ga.fr/item/02168657/