Meeh-Bunse, G., and S. Schomaker. “An Analysis of the Competitive Situation on the EU Rating Market in Context of Regulatory Requirements”. ENTRENOVA - ENTerprise REsearch InNOVAtion, vol. 6, no. 1, Sept. 2020, pp. 147-56, https://hrcak.srce.hr/ojs/index.php/entrenova/article/view/13446.