Dias, E. N., and J. L. Pais-Ribeiro. “Psychometric Properties of the Pinto and Pais-Ribeiro Spirituality Scale:Study With Elderly People Living in the Community”. Revista Kairós-Gerontologia, vol. 20, no. 4, Dec. 2017, pp. 91-110, doi:10.23925/2176-901X.2017v20i4p91-110.