@article{JGAA_2019_23_5_a4,
     author = {Shin-ichi Nakano},
     title = {A {Simple} {Algorithm} for $r$-gatherings on the {Line}},
     journal = {Journal of Graph Algorithms and Applications},
     pages = {837--845},
     publisher = {mathdoc},
     volume = {23},
     number = {5},
     year = {2019},
     doi = {10.7155/jgaa.00514},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00514/}
}