@article{MZ_1984__186_173445,
     author = {Takasi Kusano and Nichiro Kawano},
     title = {On {Positive} {Entire} {Solutions} of a {Class} of {Second} {Order} {Semilinear} {Elliptic} {Systems.}},
     journal = {Mathematische Zeitschrift},
     pages = {287--298},
     publisher = {mathdoc},
     volume = {186},
     year = {1984},
     zbl = {0523.34012},
     url = {http://geodesic.mathdoc.fr/item/MZ_1984__186_173445/}
}