Understanding Innovation in Small Firms: A Systematic Literature Review of Heterogeneity in Definitions, Drivers, and Measurement. West Science Journal Economic and Entrepreneurship, [S. l.], v. 4, n. 03, p. 453–469, 2026. DOI: 10.58812/wsjee.v4i03.2853. Disponível em: https://wsj.westsciences.com/index.php/wsee/article/view/2853. Acesso em: 29 aug. 2026.