Robert C. Zeleznik Timothy Miller Chuanjun Li Joseph J. LaViola Jr. MathPaper: Mathematical Sketching with Fluid Support for Interactive Computation. 20-32 2008 Smart Graphics http://dx.doi.org/10.1007/978-3-540-85412-8_3 conf/sg/2008 db/conf/sg/sg2008.html#ZeleznikMLL08