(1)
Abdellaoui, B.; Felli, V.; Peral, I. A Remark on Perturbed Elliptic Equations of Caffarelli-Kohn-Nirenberg Type. Rev. mat. complut. 2005, 18 ,2, 339-351. https://doi.org/10.5209/rev_REMA.2005.v18.n2.16677.