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P. Kindermann, F. Lipp, and A. Wolff. Proc. 22nd Int. Sympos. Graph Drawing (GD'14), volume 8871 of Lecture Notes in Computer Science, page 76--88. Springer-Verlag, (2014)
A. Spillner, and A. Wolff. Proc. 34th Int. Conf. Current Trends Theory &
Practice Comput. Sci. (SOFSEM'08), volume 4910 of Lecture Notes in Computer Science, page 473--484. Springer-Verlag, (2008)
S. Bereg, M. Völker, A. Wolff, and Y. Zhang. Proc. 33rd Int. Conf. Current Trends Theory &
Practice Comput. Sci. (SOFSEM'07), volume 4362 of Lecture Notes in Computer Science, page 177--186. Springer-Verlag, (2007)