Baltazar, Pedro and Caires, Luis and Vasconcelos, Vasco Thudichum and Torres Vieira, Hugo   A type system for flexible role assignment in multiparty communicating systems.   In:  Trustworthy Global Computing.   Lecture Notes in Computer Science  (8191).  Springer, pp. 82-96.  ISBN 978-3-642-41157-1      (2013)