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@article{Authenticus:P-002-TQT,
	title = {{Discrete-time fractional variational problems}},
	author = {NRO Bastos and RAC Ferreira and DFM Torres},
	doi = {10.1016/j.sigpro.2010.05.001},
	journal = {Signal Processing},
	number = {3},
	pages = {513-524},
	publisher = {Elsevier Science Bv},
	type = {Article},
	volume = {91},
	year = {2011}
}