@article{CMJ_1997__47_4_a7,
     author = {Cheng, Yuanji},
     title = {On positive solutions of quasilinear elliptic systems},
     journal = {Czechoslovak Mathematical Journal},
     pages = {681--687},
     publisher = {mathdoc},
     volume = {47},
     number = {4},
     year = {1997},
     mrnumber = {1479312},
     zbl = {0899.35032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_1997__47_4_a7/}
}