Sackett, A.; Meyvis, T.; Nelson, L.; Converse, B.; Sackett, A. (2010). "You're having fun when time flies: the hedonic consequences of subjective time progression". Psychological science : a journal of the American Psychological Society / APS. 21 (1): 111–117. doi:10.1177/0956797609354832. PMID20424031.
medicalnewstoday.com
Glynn, Sarah (באוגוסט 2012). "Why Time Flies When You're Having Fun". Medical News Today. נבדק ב-2013-02-06. Just being content or satisfied may not make time fly, but being excited or actively pursuing a desired object can.{{cite news}}: (עזרה)
nih.gov
pubmed.ncbi.nlm.nih.gov
Sackett, A.; Meyvis, T.; Nelson, L.; Converse, B.; Sackett, A. (2010). "You're having fun when time flies: the hedonic consequences of subjective time progression". Psychological science : a journal of the American Psychological Society / APS. 21 (1): 111–117. doi:10.1177/0956797609354832. PMID20424031.