Andrea Bracciali Marcello Brunelli Enrico Cataldo Pierpaolo Degano Synapses as stochastic concurrent systems. 66-82 2008 408 Theor. Comput. Sci. 1 http://dx.doi.org/10.1016/j.tcs.2008.07.008 db/journals/tcs/tcs408.html#BraccialiBCD08