Andrew Fish, Chris John, John Taylor. A Normal Form for Euler Diagrams with Shading. In Gem Stapleton, John Howse, John Lee, editors, Diagrammatic Representation and Inference, 5th International Conference, Diagrams 2008, Herrsching, Germany, September 19-21, 2008. Proceedings. Volume 5223 of Lecture Notes in Computer Science, pages 206-221, Springer, 2008. [doi]
Abstract is missing.