Moniz, E., Pires, L., Barreto Carvalho, C. e Marina Afonso, R. 2025. Factorial analysis and invariance of the Portuguese version of the UCLA Loneliness Scale – Version 3. PSICOLOGIA. 39, 1 (Jul. 2025), 63–75. DOI:https://doi.org/10.17575/psicologia.1998.