AUSUBEL, Jesse H. - GRÜBLER, Arnulf. Working Less and Living Longer : Long-Term Trends in Working Time and Time Budgets. 1. ed. Laxenburg : International Institute for Applied Systems Analysis, 1996. S. 196-213. RR-96-4. [Počet ex. : 1, z toho voľných 1, prezenčne 0]