Rudolf Melcher Martin Hitz Gerhard Leitner ActionSpaces: Device Independent Places of Thought, Memory and Evolution. 355-364 2009 HCI (6) http://dx.doi.org/10.1007/978-3-642-02710-9_39 conf/hci/2009-6 db/conf/hci/hci2009-6.html#MelcherHL09