Kirchhoff's Pen: A Pen-based Circuit Analysis Tutor. - Ruwanee de Silva; David Tyler Bischel; WeeSan Lee; Eric Jeffrey Peterson; Robert C. Calfee; Thomas F. Stahovich (SBIM, 2007)

Combining Speech and Sketch to Interpret Unconstrained Descriptions of Mechanical Devices. - David Tyler Bischel; Thomas F. Stahovich; Eric Jeffrey Peterson; Randall Davis; Aaron Adler (IJCAI, 2009)