@unpublished {2741,
	title = {Frequency estimation by zooming },
	year = {2005},
	attachments = {https://docentes.fct.unl.pt/sites/default/files/mdo/files/frequency_estimation_by_zooming.pdf},
	author = {Manuel D. Ortigueira and Ant{\'o}nio S. Serralheiro}
}
