Jeffrey Parsons Antoni Olivé Sudha Ram Gerd Wagner Yair Wand Eric S. K. Yu Panel: New Directions for Conceptual Modeling. 524-525 2011 ER http://dx.doi.org/10.1007/978-3-642-24606-7_43 conf/er/2011 db/conf/er/er2011.html#ParsonsORWWY11