Ravich, Timothy M. “Grounding Innovation: How Ex-Ante Prohibitions and Ex-Post Allowances Impede Commercial Drone Use”. Columbia Business Law Review 2018, no. 2 (June 10, 2019): 495–585. Accessed July 18, 2024. https://journals.library.columbia.edu/index.php/CBLR/article/view/1697.