Lin Liu Zhi Jin Ruqian Lu Towards Controllable Requirements Engineering Processes based on Cybernetics. 229-232 2007 conf/compsac/2007 COMPSAC (2) http://doi.ieeecomputersociety.org/10.1109/COMPSAC.2007.221 db/conf/compsac/compsac2007-2.html#LiuJL07