Web Services, Formal Methods, and Behavioral Types 11th International Workshop, WS-FM 2014, Eindhoven, The Netherlands, September 11-12, 2014, and 12th International Workshop, WS-FM/BEAT 2015, Madrid, Spain, September 4-5, 2015, Revised Selected Papers - Hildebrandt, Thomas; Ravara, António; van der Werf, Jan Martijn; Weidlich, Matthias (Springer International Publishing : Imprint: Springer, 2016)