@article{10_4064_sm_73_2_115_151,
     author = {Maciej Wojtkowski},
     title = {Geodesics on open surfaces containing horns},
     journal = {Studia Mathematica},
     pages = {115--151},
     publisher = {mathdoc},
     volume = {73},
     number = {2},
     year = {1982},
     doi = {10.4064/sm-73-2-115-151},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-73-2-115-151/}
}