Erika Tamm et al., « Genome-wide analysis of Corsican population reveals a close affinity with Northern and Central Italy », in Scientific Reports, volume 9, Article No. 13581, 2019 ([1]).
"Corsican in France". Euromosaic. Retrieved 13 June 2008. To access the data, click on List by languages, Corsican, Corsican in France, then scroll to Geographical and language background.
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"Corsican language use survey". Euromosaic. Retrieved 13 June 2008. To find this statement and the supporting data click on List by languages, Corsican, Corsican language use survey and look under INTRODUCTION.