Ernst Althaus Denys Duchier Alexander Koller Kurt Mehlhorn Joachim Niehren Sven Thiel An efficient graph algorithm for dominance constraints. 194-219 2003 48 J. Algorithms 1 http://dx.doi.org/10.1016/S0196-6774(03)00050-6 db/journals/jal/jal48.html#AlthausDKMNT03