Martínez-Alonso, R., M. J. Martínez-Romero, and A. A. Rojo-Ramírez. “R&D Collaboration Breadth and Family-Firm Innovation Efficiency: The Role of Family Management and Generational Stage”. Technological and Economic Development of Economy, vol. 29, no. 2, Mar. 2023, pp. 677–695, doi:10.3846/tede.2023.18526.