Noriyuki Fujimoto Kenichi Hagihara Optimal Task Scheduling of a Complete K-Ary Tree with Communication Delays. 71-78 2001 conf/ppam/2001 PPAM http://link.springer.de/link/service/series/0558/bibs/2328/23280071.htm db/conf/ppam/ppam2001.html#FujimotoH01