Chowdhury, Subarna Roy, and Debdatta Saha, trans. “Understanding Innovation in Small Firms: A Systematic Literature Review of Heterogeneity in Definitions, Drivers, and Measurement”. West Science Journal Economic and Entrepreneurship 4, no. 03 (August 20, 2026): 453–469. Accessed August 29, 2026. https://wsj.westsciences.com/index.php/wsee/article/view/2853.