Fuyuki Ishikawa Nobukazu Yoshioka Yasuyuki Tahara Shinichi Honiden A hierarchical mobile agent framework and its application to multimedia contents. 1-17 2007 38 Systems and Computers in Japan 1 http://dx.doi.org/10.1002/scj.20624 db/journals/scjapan/scjapan38.html#IshikawaYTH07