1. Anderson ,An updated and theoretical rationale for interaction.IT Forum. Retrieved 25 April, (2004)
2. Liu T.-C., Wang H.-Y., Liang J.-K., Chan T.-W., & Yang J.-C.Applying wireless technologies to a build highly interactive learning environment.In IEEE international workshop on wireless and mobile technologies in education, Växjö, Sweden, (2002)
3. Markett C., Arnedillo Sanchez I., Weber S., Tangney B..Using short message service to encourage interactivity in the classroom.Science. Direct. Computer & Education, (2006)