Text ( visual ) : unmediated Pervasive computing : second International Conference, PERVASIVE 2004, Linz/Vienna, Austria, April 18-23, 2004 : proceedings / Alois Ferscha, Friedemann Mattern (eds.). -- Berlin ; Tokyo : Springer , c2004. -- xvii, 358 p. : ill. ; 24 cm. -- (Lecture notes in computer science ; 3001). -- Includes bibliographies and index. -- ISBN 3540218351 ; (BA66887098) ; https://ci.nii.ac.jp/ncid/BA66887098 Author Heading(s): Pervasive ; Ferscha, Alois ; Mattern, Friedemann