@article{10_4064_ba52_4_10,
     author = {Nick Dungey},
     title = {Some {Gradient} {Estimates} on {Covering} {Manifolds}},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {437--443},
     publisher = {mathdoc},
     volume = {52},
     number = {4},
     year = {2004},
     doi = {10.4064/ba52-4-10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba52-4-10/}
}