@article{10_4064_sm169_1_3,
     author = {Anders Bj\"orn},
     title = {Characterizations of $p$-superharmonic functions on metric spaces},
     journal = {Studia Mathematica},
     pages = {45--62},
     publisher = {mathdoc},
     volume = {169},
     number = {1},
     year = {2005},
     doi = {10.4064/sm169-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm169-1-3/}
}