@article{JGAA_2012_16_2_a9,
     author = {Vassilis Tsiaras and Ioannis Tollis},
     title = {DAGmaps and {\ensuremath{\varepsilon}-Visibility} {Representations} for {DAGs:} {Algorithms} and {Characterizations}},
     journal = {Journal of Graph Algorithms and Applications},
     pages = {359--380},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2012},
     doi = {10.7155/jgaa.00262},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00262/}
}