On metro-line crossing minimization. Argyriou, Evmorfia; Bekos, Michael A.; Kaufmann, Michael; Symvonis, Antonios — 2010 Journal of Graph Algorithms and Applications
On the perspectives opened by right angle crossing drawings. Angelini, Patrizio; Cittadini, Luca; Didimo, Walter; Frati, Fabrizio; Di Battista, Giuseppe; Kaufmann, Michael; Symvonis, Antonios — 2011 Journal of Graph Algorithms and Applications