"Populations légales 2017".
INSEE.
Retrieved 6 January 2020.

Michellin, Corse, s.v. "
La Porta"
P.J. Perry, "Economy, landscape and society in La Castagniccia (Corsica) since the late eighteenth century" Transactions of the Institute of British Geographers 41 (June 1967:209-222) pp.
209, 211 and passim.
Perry notes that the two cantons of the Castagniccia supported nearly 9000 inhabitants in the early 19th century.

Perry 1967.

According to Michelin, Corse.
"Populations légales 2017". INSEE. Retrieved 6 January 2020.
Michellin, Corse, s.v. "La Porta"
P.J. Perry, "Economy, landscape and society in La Castagniccia (Corsica) since the late eighteenth century" Transactions of the Institute of British Geographers 41 (June 1967:209-222) pp. 209, 211 and passim. Perry notes that the two cantons of the Castagniccia supported nearly 9000 inhabitants in the early 19th century.
Perry 1967.
According to Michelin, Corse.
La Porta