%0 Journal Article %A Jan Christoph Athenstädt %A Sabine Cornelsen %T Planarity of Overlapping Clusterings Including Unions of Two Partitions %J Journal of Graph Algorithms and Applications %D 2017 %P 1057-1089 %V 21 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00450/ %R 10.7155/jgaa.00450 %G en %F JGAA_2017_21_6_a4