Noriko Matsumoto Norihiko Yoshida Shuji Narazaki Layered Cooperation of Macro Agents and Micro Agents in Cooperative Active Contour Model. 86-97 2007 PRIMA http://dx.doi.org/10.1007/978-3-642-01639-4_8 conf/prima/2007 db/conf/prima/prima2007.html#MatsumotoYN07