### Journal Papers

**Hayward J.** **&** **Boswell G.P.** (2014). Model Behaviour and the Concept of Loop Impact: A Practical Method. *System Dynamics Review*, 30(1), 29-57. DOI: 10.1002/sdr.1511**Hayward J. & Roach P.A.** (2017). Newton’s Laws as an Interpretive Framework in System Dynamics. *System Dynamics Review*, 33(3-4), 183-218. DOI: 10.1002/sdr.1586.**Hayward J**. **&** **Roach P.A.** (2019). The Concept of Force in Population Dynamics, Physica A: Statistical Mechanics and its Applications, 531, 121736, DOI: 10.1016/j.physa.2019.121736. -
**Hayward J. & Roach P.A.** (2022). The Concept of Energy in the Analysis of System Dynamics Models, *System Dynamics Review*, accepted for publication.

### Conference Papers

### Technical Reports