Further development of a Causal model for Air Transport Safety (CATS): Building the mathematical heart. - Ben J. M. Ale; L. J. Bellamy; R. van der Boom; J. Cooper; Roger M. Cooke; Louis H. J. Goossens; A. R. Hale; Dorota Kurowicka; O. Morales; A. L. C. Roelen; J. Spouge (Reliab. Eng. Syst. Saf., 2009)