@article{10_4064_cm117_2_10,
     author = {Outi Elina Maasalo and Anna Zatorska-Goldstein},
     title = {A note on global integrability of upper gradients
 of $p$-superharmonic functions},
     journal = {Colloquium Mathematicum},
     pages = {281--288},
     publisher = {mathdoc},
     volume = {117},
     number = {2},
     year = {2009},
     doi = {10.4064/cm117-2-10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm117-2-10/}
}