Петров, Даниел, and Йоана Петрова. “INNOVATION ABSORPTIVE EFFICIENCY BEYOND INFRASTRUCTURE SATURATION: COMPARATIVE INSIGHTS FROM BULGARIA AND THE UNITED STATES”. E-Journal VFU, no. 24 (September 16, 2025): 268–281. Accessed September 27, 2025. https://ejournal.vfu.bg/index.php/vfu/article/view/210.