@conference {5414,
	title = {Fractional Centred Differences and Derivatives},
	booktitle = {Proceedings of the 2nd IFAC Workshop on Fractional Differentiation and its Applications},
	year = {2006},
	abstract = {<p>n/a</p>
},
	url = {http://oa.uninova.pt/1011/},
	author = {Ortigueira, M.}
}
