Silvia Crafa Daniele Varacca Nobuko Yoshida Compositional Event Structure Semantics for the Internal <i>pi</i> -Calculus. 317-332 2007 conf/concur/2007 CONCUR http://dx.doi.org/10.1007/978-3-540-74407-8_22 db/conf/concur/concur2007.html#CrafaVY07