VELYCHKO, Y. Measuring organic social media distribution as a sustainable entrepreneurship practice: A protocol for lead generation research in professional services. Economics, Management and Sustainability, [S. l.], v. 11, n. 1, p. 27–67, 2026. DOI: 10.14254/jems.2026.11-1.2. Disponível em: https://jems.sciview.net/index.php/jems/article/view/266. Acesso em: 12 apr. 2026.