Casanova, M. P., M. C. Nelson, M. A. Pickering, K. M. Appleby, E. J. Grindley, L. W. Larkins, and R. T. Baker. “Measuring Psychological Pain: Psychometric Analysis of the Orbach and Mikulincer Mental Pain Scale”. Measurement Instruments for the Social Sciences, Vol. 3, no. 1, May 2021, p. Article e11059, doi:10.1186/s42409-021-00025-8.