Formalizing Causal Block Diagrams for Modeling a Class of Hybrid Dynamic Systems. - Ben Denckla; Pieter J. Mosterman (CDC/ECC, 2005)

Many cyclic block diagrams do not need parallel semantics. - Ben Denckla (ACM SIGPLAN Notices, 2006)

Towards Computational Hybrid System Semantics for Time-Based Block Diagrams. - Pieter J. Mosterman; Justyna Zander; Grégoire Hamon; Ben Denckla (ADHS, 2009)