@article{10_4153_CJM_1998_056_8,
     author = {Chen, Jingyi and Hsu, Elton P.},
     title = {Gradient {Estimates} for {Harmonic} {Functions} on {Manifolds} {With} {Lipschitz} {Metrics}},
     journal = {Canadian journal of mathematics},
     pages = {1163--1175},
     year = {1998},
     volume = {50},
     number = {6},
     doi = {10.4153/CJM-1998-056-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1998-056-8/}
}