Natzkova, J., & Stoyanova, V. (2023). Assessment of the Subjectively Perceived Cognitive Deficit in Hospitalized Elderly Patients with Depression and the Relationship of Perceived Deficit Questionnaire – PDQ-D5 with the Socio-demographic and Clinical Factors. Proceedings of the Bulgarian Academy of Sciences, 76(2), 292–301. https://doi.org/10.7546/CRABS.2023.02.14