Nobuhito Yamamoto Tomoyuki Nishioka Syoko Shiroma Building Problem Spaces for Deaf and Hard of Hearing Students' Spatial Cognition in a Programming Language. 167-175 2009 HCI (7) http://dx.doi.org/10.1007/978-3-642-02713-0_18 conf/hci/2009-7 db/conf/hci/hci2009-7.html#YamamotoNS09