Miró-Pérez, A.-P. et al. 2020. THE AUTOMOTIVE SECTOR IN SPAIN. INFLUENCE OF R&D INVESTMENT ON THE IMPROVEMENT OF TOTAL FACTOR PRODUCTIVITY. Zeszyty Naukowe UPH seria Administracja i Zarządzanie. 49, 122 (Jan. 2020), 55–62. DOI:https://doi.org/10.34739/zn.2019.49.06.