On Workflow Enabled e-Learning Services. - Joe Y.-C. Lin; Charley Ho; Wasim Sadiq; Maria E. Orlowska (ICALT, 2001)

Using Workflow Technology to Manage Flexible e-Learning Services. - Joe Y.-C. Lin; Charley Ho; Wasim Sadiq; Maria E. Orlowska (J. Educ. Technol. Soc., 2002)