The effect of Twitter on college student engagement and grades. - Reynol Junco; Greg Heiberger; E. Loken (J. Comput. Assist. Learn., 2011)

Putting twitter to the test: Assessing outcomes for student collaboration, engagement and success. - Reynol Junco; C. Michael Elavsky; Greg Heiberger (Br. J. Educ. Technol., 2013)