Y. E. Eusebio Benites, A. M. Sosa Malqui, H. M. Lazaro-Acero, and M. A. Suxe Ramírez, “Impact of relationship marketing on customer loyalty in the Peruvian sports fitness sector”, LACCEI, vol. 1, no. 14, July 2026, doi: 10.18687/LACCEI2026.1.1.1640.