Sinnott-Armstrong, Walter, Consequentialism, The Stanford Encyclopedia of Philosophy, Spring, 2014, sect. 6.
Williams, Bernard, A Critique of Utilitarianism, in J. C. C. Smart & Bernard Williams, Utilitarianism: For and Against, Cambridge: Cambridge University Press, 1973, pp. 93-118.
Further reading
Hooker, Brad, The Demandingness Objection, in Timothy Chappell (ed.), The Problem of Moral Demandingness: New Philosophical Essays, New York: Palgrave, 2009, pp. 148-62.
Kagan, Shelly, The Limits of Morality, Oxford: Oxford University Press, 1989, pp. 1-6, 231-270.