@article{article363e4e01,
title   = {Harnack inequality for a class of degenerate elliptic operators},
author = {Fernandes, José Carlos Diniz and Groisman, Jorge and Melo, Severino Toscano do Rego},
year = {2003},
doi = {10.4171/ZAA/1135},
journal   = {Zeitschrift fur Analysis und ihre Anwendungen}
}