Elena Barber and Peter Reimann. 2013. Assessment and Evaluation of Time Factors in Online Teaching and Learning. IGI Global.
Johanna Varjonen and Kristiina Aalto. 2013. Kotitalouksien Palkaton Tuotanto ja Sen Muutokset 2001 2009 (Hush虱lens oavl ade produktion och f 舅dringar i produktionen 2001 2009 / Households Unpaid Production and Change 2001 2009). Helsinki, Finland: Kuluttajatutkimuskeskus (National Consumer Research Centre).
Special issue of eLearn Center Research Paper Series on time use of e-learning PhD students http://elcrps.uoc.edu/ojs/index.php/elcrps
