@conference {OA323,
	title = {Considerations about the choice of a differintegrator},
	booktitle = {International Conference on Computacional Cybernetics},
	year = {2004},
	note = {n/a},
	month = {September},
	abstract = {n/a},
	url = {http://oa.uninova.pt/323/},
	author = {Manuel Ortigueira and J.A. Tenreiro-Machado and J. S{\'a} da Costa}
}
