William R. Anderson Larry Fields Thelma E. Simons Kathy Pribbenow Christopher Jones Crossing the bridge while you build it: a smooth migration to new servers and services. 3-7 2001 conf/siguccs/2001 SIGUCCS http://doi.acm.org/10.1145/500956.500959 db/conf/siguccs/siguccs2001.html#AndersonFSPJ01