Szwed, M.; Gorbaniuk, O.; Buglińska, J.; Boreczek, W.; Mazur, M. Measuring Depression As a Short-Term State and As a Trait: Multilevel Approach. Curr Probl Psychiatry 2025, 26, 65-72. https://doi.org/10.12923/2353-8627/2025-0006.