Chen, N. - S., Wei, C.-W., Kinshuk, Chen, Y.-R., & Wang, Y.-C. (2008). Bridging the gap between face-to-face and cyber interaction in holistic blended learning environments. In D & Sampson J. M. Pawlowski K. H. H. (Ed.), Handbook on Information Technologies for Education and Training (2nd ed., pp. 239–259). Heidelberg: Springer.