@article{JEMS_2013_15_3_a6,
     author = {Richard F. Bass},
     title = {A stability theorem for elliptic {Harnack} inequalities},
     journal = {Journal of the European Mathematical Society},
     pages = {857--876},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2013},
     doi = {10.4171/jems/379},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/379/}
}