Lorenzo Cantoni Luca Botturi Marco Faré Davide Bolchini Playful Holistic Support to HCI Requirements Using LEGO Bricks. 844-853 2009 HCI (10) http://dx.doi.org/10.1007/978-3-642-02806-9_97 conf/hci/2009-10 db/conf/hci/hci2009-10.html#CantoniBFB09