Panadero, S., Vázquez, J. J., Guillén, A. I., Martín, R. M., & Cabrera, H. (2013). Differences in overall happiness among homeless people in Madrid (Spain). Revista De Psicología, 22(2), Pág. 53–63. https://doi.org/10.5354/0719-0581.2013.30853