T. L. Texier and L. Ragni, “'Hybrid ' Competition, Innovation Outcomes and Regulation: a Duopoly Model”, DEM, vol. 5, no. 1, pp. 222–241, Jun. 2020, Accessed: Oct. 23, 2026. Available: https://fimagis.pl/exs/ojs/index.php/demo/article/view/1182