A. Płaczek, “When a part of ‘self’ dies: On grief and the feeling of loneliness after losing a beloved animal”, in Difficult situation in biographies: Volume 9, E. Dubas and J. Sztobryn-Bochomulska, Eds. Poland: Lodz University Press, 2025, pp. 227–245. doi: 10.18778/8331-754-0.14.