Vasanth Bala Jehoshua Bruck Robert Cypher Pablo Elustondo Alex Ho Ching-Tien Ho Shlomo Kipnis Marc Snir CCL: A Portable and Tunable Collective Communication Library for Scalable Parallel Computers. 154-164 1995 6 IEEE Trans. Parallel Distrib. Syst. 2 http://www.computer.org/tpds/td1995/l0154abs.htm db/journals/tpds/tpds6.html#BalaBCEHHKS95