Sabine Kuske

Martin Gogolla, Paul Ziemann, Sabine Kuske: Towards an Integrated Graph Based Semantics for UML, Graph Transformation and Visual Modeling Techniques (GT-VMT 2002), 2002, (BibTeX entry).
Sabine Kuske: A Formal Semantics of UML State Machines Based on Structured Graph Transformation, Fourth International Conference on the Unified Modeling Language: UML 2001, 2001, (BibTeX entry).
Sabine Kuske, Martin Gogolla, Ralf Kollmann, Hans-Jörg Kreowski: An Integrated Semantics for UML Class, Object, and State Diagrams based on Graph Transformation, Springer, 2002, (BibTeX entry).

dblp: Computer Science Bibliography (University of Trier, Germany). (Note that this does not always work due to different naming schemes.)