Staller, Mario, Swen Körner, and Andrew Abraham. “Beyond Technique: The Limits of Books (and Online Videos) in Developing Self-Defence Coaches’ Professional Judgement and Decision Making in the Context of Skill Development for Violent Encounters”. Acta Periodica Duellatorum 8, no. 1 (October 15, 2020): 157-172. Accessed June 24, 2021. https://bop.unibe.ch/apd/article/view/7159.