Lehrenfeld, Georg, Wolfgang Müller, and C. Tahedl. “Transforming SDL Diagrams Into a Complete Visual Representation.”https://doi.org/10.1109/VL.1995.520803__In Proceedings of Symposium on Visual Languages.https://doi.org/10.1109/VL.1995.520803__Darmstadt, Germany , 1995.https://doi.org/10.1109/VL.1995.520803 .