Maurice Herlihy Sergio Rajsbaum Mark R. Tuttle An Axiomatic Approach to Computing the Connectivity of Synchronous and Asynchronous Systems. 79-102 2009 230 Electr. Notes Theor. Comput. Sci. http://dx.doi.org/10.1016/j.entcs.2009.02.018 db/journals/entcs/entcs230.html#HerlihyRT09