@conference {OA1011,
	title = {Fractional Centred Differences and Derivatives},
	booktitle = {Proceedings of the 2nd IFAC Workshop on Fractional Differentiation and its Applications},
	year = {2006},
	note = {n/a},
	abstract = {n/a},
	url = {http://oa.uninova.pt/1011/},
	author = {Manuel Ortigueira}
}
