Steinar Carlsen John Krogstie Odd Ivar Lindland Evaluating Flexible Workflow Systems. 230-239 1997 HICSS (2) http://csdl.computer.org/comp/proceedings/hicss/1997/7734/02/7734020230abs.htm db/conf/hicss/hicss1997-2.html#CarlsenKL97