@inbook {Heyd2005supererogatory,
	title = {Supererogatory Giving: Can Derrida{\textquoteright}s Circle Be Broken?},
	booktitle = {Philosophia Practica Universalis, Festschrift f{\"u}r Joachim Hrushcka},
	year = {2005},
	pages = {149{\textendash}165},
	publisher = {Duncker \& Humblot},
	organization = {Duncker \& Humblot},
	address = {Berlin},
	author = {Heyd, David}
}
