Kessels, J., Mulder, I., & Swaak, J. (2004). Assessing group learning and shared understanding [in Russian]. Elearning World, (4), 52–61. Kessels, J., Mulder, I., & Swaak, J. (2004). Assessing group learning and shared understanding [in Russian]. Elearning World, (4), 52–61..pdf