@article{MAN_1995__302_2_165334,
     author = {Z.Q. Chen and Z. Zhao},
     title = {Diffusion processes and second order elliptic operators with singular coefficients for lower order terms.},
     journal = {Mathematische Annalen},
     pages = {323--358},
     publisher = {mathdoc},
     volume = {302},
     number = {2},
     year = {1995},
     zbl = {0876.35029},
     url = {http://geodesic.mathdoc.fr/item/MAN_1995__302_2_165334/}
}