Conquering the cube: learning to sketch primitives in perspective with an intelligent tutoring system. - Swarna Keshavabhotla; Blake Williford; Shalini Priya Ashok Kumar; Ethan C. Hilton; Paul Taele; Wayne Li; Julie Linsey; Tracy Hammond (SBIM@Expressive, 2017)

It's Not Just about Accuracy: Metrics That Matter When Modeling Expert Sketching Ability. - Tracy Hammond; Shalini Priya Ashok Kumar; Matthew Runyon; Josh Cherian; Blake Williford; Swarna Keshavabhotla; Stephanie Valentine; Wayne Li; Julie Linsey (ACM Trans. Interact. Intell. Syst., 2018)