Naokazu Nemoto Katsuya Tanaka Makoto Takizawa Quality-Based Approach to Locking Multimedia Objects. 351-356 2001 conf/icdcsw/2001 ICDCS Workshops http://doi.ieeecomputersociety.org/10.1109/CDCS.2001.918729 db/conf/icdcsw/icdcsw2001.html#NemotoTT01