Here is a link to a good essay by Margaret Somerville entitled–“Euthanasia: it’s a long, long, long way down.” Her essay discusses the logical and practical slippery slopes, and also the idea that “no potential slippery slope exists” because “the diminishment or repeal of existing restrictions [on euthanasia] is not recognized as a slippery slope, rather, it’s seen simply as more fully implementing respect for individual autonomy and the right to self-determination, the rationale used to justify euthanasia in the first place.”