Patterns of image comparison using compare and contrast feature in Urinalysis Tutor™. - Sara Kim; Michael L. Astion (Br. J. Educ. Technol., 2000)

Design implications from a usability study of GramStain-TutorTM. - Sara Kim; Douglas M. Brock; Adam Orkand; Michael L. Astion (Br. J. Educ. Technol., 2001)