Petr A. Golovach, Daniël Paulusma, Jian Song. Computing Vertex-Surjective Homomorphisms to Partially Reflexive Trees. In Alexander S. Kulikov, Nikolay K. Vereshchagin, editors, Computer Science - Theory and Applications - 6th International Computer Science Symposium in Russia, CSR 2011, St. Petersburg, Russia, June 14-18, 2011. Proceedings. Volume 6651 of Lecture Notes in Computer Science, pages 261-274, Springer, 2011. [doi]
Abstract is missing.