Bolek, Monika, and Katerina Lyroudi. “Do Intangibles Influence the Market Rate of Return? Panel Data Analysis of the Newconnect Market in Warsaw”. European Scientific Journal, ESJ 13, no. 1 (January 31, 2017): 12. Accessed May 28, 2026. https://last.eujournal.org/index.php/esj/article/view/8737.