Billis, Emmanouil Otto Hahn Research Group on Alternative and Informal Systems of Crime Control and Criminal Justice, Max Planck Institute for the Study of Crime, Security and Law, Max Planck Society;
https://theartofcrime.gr/wp-content/uploads/2016/10/3_INTERVIEW_EN_TEYXOS_8.pdf (Any fulltext)
Tzannetaki, T., & Billis, E. (2020). Interview with Professors Andrew Ashworth and Lucia Zedner. The Art of Crime, (8).