Meng Yu Peng Liu Wanyu Zang Self-Healing Workflow Systems under Attacks. 418-425 2004 conf/icdcs/2004 ICDCS http://csdl.computer.org/comp/proceedings/icdcs/2004/2086/00/20860418abs.htm db/conf/icdcs/icdcs2004.html#YuLZ04