Wojtyńska, J. Disabled Seniors: Problems With Concept Operationalization. In Researching Disability. The Opportunities and Dangers of Theoretical and Methodological Assumptions in Disability Studies; Całek, G., Niedbalski, J., Żuchowska-Skiba, D., Eds.; Lodz University Press: Poland, 2020; pp. 255-273. https://doi.org/10.18778/8142-757-9.17.