Dr. Wagon: a 'stretchable' toolkit for tangible computer programming. - Kunal Chawla; Megan Chiou; Alfredo Sandes; Paulo Blikstein (IDC, 2013)

Student Coding Styles as Predictors of Help-Seeking Behavior. - Engin Bumbacher; Alfredo Sandes; Amit Deutsch; Paulo Blikstein (AIED, 2013)