Full Citation:
Pim van ’t Hof, Marcin Kamiński, Daniël Paulusma, Stefan Szeider, Dimitrios M. Thilikos. On graph contractions and induced minors. Discr. Appl. Math., volume 160, number 6, pages 799-809, 2012.
Stefan Szeider is a Professor at the Algorithms and Complexity Group.