@article{CMH_1990__65_3_140210,
     author = {Richard K. Skora},
     title = {Geometric actions of surface groups on ...-trees.},
     journal = {Commentarii mathematici Helvetici},
     pages = {519--533},
     publisher = {mathdoc},
     volume = {65},
     number = {3},
     year = {1990},
     zbl = {0724.57008},
     url = {http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140210/}
}