@article{GDZPPN002089475,
title = {Harnack's Inequality for Elliptic Differential Equations on Minimal Surfaces.},
journal = {Inventiones mathematicae},
volume = {14},
year = {1971},
pages = {24-46},
zbl = {0227.35021},
url = {http://dml.mathdoc.fr/item/GDZPPN002089475}
}
Bombieri, E.; Giusti, E. Harnack's Inequality for Elliptic Differential Equations on Minimal Surfaces.. Inventiones mathematicae, Tome 14 (1971) pp. 24-46. http://gdmltest.u-ga.fr/item/GDZPPN002089475/