also in "Il Venerdì di Repubblica" 8.7.2016: "Più si legge più si diventa ricchi"
http://www.radio1.rai.it/dl/portaleRadio/media/ContentItem-d25c5f55-3073-46d7-9b66-1d1ce4440502.html
http://www.ieb.ub.edu/index.php?option=com_webplayer&view=default&Itemid=88&wid=34#.VD_j-Gd_t1Yhttp://www.ieb.ub.edu/index.php?option=com_webplayer&view=default&Itemid=88&wid=34#.VD_j-Gd_t1Y
http://oecdinsights.org/2015/05/10/work-longer-for-a-healthy-economy-and-a-happy-home/