Student Modelers. - Jere Confrey; Helen M. Doerr (Interact. Learn. Environ., 1994)

Creating a Virtual Classroom for Interactive Education on the Web. - Dan Dwyer; Kathy Barbieri; Helen M. Doerr (Comput. Networks ISDN Syst., 1995)

Stella ten years later: A review of the literature. - Helen M. Doerr (Int. J. Comput. Math. Learn., 1996)