Physician-assisted suicide and direct active euthanasia
For the question of the ethical assessment of physician-assisted suicide on the one hand and of direct active euthanasia on the other, see, for example:
Birnbacher, D. (2010). Sterbehilfe – Eine philosophische Sicht. In F. Thiele (Ed.), Aktive und passive Sterbehilfe (pp. 31–42). Brill | Fink.
Fontalis, A., Prousali, E., Kulkarni, K. (2018). Euthanasia and assisted dying: what is the current position and what are the key arguments informing the debate? Journal of Royal Society of Medicine, 111(11), 407 –413. https://doi.org/10.1177/0141076818803452
McMahan, J. (2002). The Ethics of Killing: Problems at the Margins of Life. Oxford University Press.
Wittwer, H. (2020). Das Leben beenden. Über die Ethik der Selbsttötung. Mentis Verlag.
Wittwer, H. (Ed.). (2020). Sterbehilfe und ärztliche Beihilfe zum Suizid. Grundlagentexte zur ethischen Debatte. Karl Alber.
Young, R. (2024). Voluntary Euthanasia. The Stanford Encyclopedia of Philosophy (Edward N. Zalta & Uri Nodelman (Eds.)). https://plato.stanford.edu/archives/sum2024/entries/euthanasia-voluntary