Text ( visual ) : unmediated Learning, networks and statistics / edited by G. Della Riccia, H.-J. Lenz, R. Kruse. -- Wien : Springer-Verlag , c1997. -- 230 p. : ill. ; 24 cm. -- (CISM courses and lectures ; No. 382). -- ISBN 3211829105 ; (BA33934534) ; https://ci.nii.ac.jp/ncid/BA33934534 Author Heading(s): Della Riccia, G. ; Lenz, Hans-Joachim ; Kruse, Rudolf