@article{CMH_1955__29_139099,
     author = {Albert Pfluger},
     title = {Extremall\"angen und {Kapazit\"at.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {120--131},
     publisher = {mathdoc},
     volume = {29},
     year = {1955},
     zbl = {0066.32802},
     url = {http://geodesic.mathdoc.fr/item/CMH_1955__29_139099/}
}