Kolinek-Siechowicz, K. and Siechowicz, P. 2020. Zofia Lissa vs Roman Ingarden. The Case of the Musical Work Identity. Acta Universitatis Lodziensis. Folia Philosophica. Ethica-Aesthetica-Practica. 35 (Jun. 2020), 81–95. DOI:https://doi.org/10.18778/0208-6107.35.05.