@article{JGAA_2015_19_2_a6,
     author = {Emilio Di Giacomo and Giuseppe Liotta and Fabrizio Montecchiani},
     title = {Drawing {Outer} 1-planar {Graphs} with {Few} {Slopes}},
     journal = {Journal of Graph Algorithms and Applications},
     pages = {707--741},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2015},
     doi = {10.7155/jgaa.00376},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00376/}
}