Dutch time use survey http://www.scp.nl/Publicaties/Alle_publicaties/Publicaties_2013/Met_het_oog_op_de_tijd

http://sds.ukzn.ac.za/default.php?1,10,367,4,0

Elena Barber (ed) and Peter Reimann (ed). 2013. Assessment and Evaluation of Time Factors in Online Teaching and Learning. Hershey, Pennsylvania, USA: IGI-Global. http://www.igi-global.com/book/assessment-evaluation-time-factors-online/773…

Emilio Zagheni and Marina Zannella. 2013. The Life Cycle Dimension of Time Transfers in Europe. Demographic Research 29(35), 937-948.