@article{PM_2001_2001_1_a11,
     author = {Kenig, Carlos E. and Pipher, Jill},
     title = {El problema de {Dirichlet} para ecuaciones el{\'\i}pticas con t\'erminos de deriva.},
     journal = {Publicacions matem\`atiques},
     pages = {199-217},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_2001_2001_1_a11/}
}