Krzemińska, S., and E. Bąk. “Health Locus of Control, Self-Efficacy and Dispositional Optimism in Patients With Diabetes Mellitus 2 - Review of the Literature”. Journal of Education, Health and Sport, vol. 13, no. 3, Feb. 2023, pp. 175-80, doi:10.12775/JEHS.2023.13.03.025.