@article{10_1090_S0894_0347_2014_00805_5,
     author = {Hofmann, Steve and Kenig, Carlos and Mayboroda, Svitlana and Pipher, Jill},
     title = {Square function/non-tangential maximal function estimates and the {Dirichlet} problem for non-symmetric elliptic operators},
     journal = {Journal of the American Mathematical Society},
     pages = {483--529},
     publisher = {mathdoc},
     volume = {28},
     number = {2},
     year = {2015},
     doi = {10.1090/S0894-0347-2014-00805-5},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-2014-00805-5/}
}