Tolong jelaskan mengenai Bacaan lanjut dari Ingria

Kurs, Ott (1994). Ingria: The broken landbridge between Estonia and Finland. GeoJournal 33.1, 107–113.

Kepsu, Kasper. 2017. The Unruly Buffer Zone: The Swedish province of Ingria in the late 17th century. Scandinavian Journal of History.

Site of the Ingrian Cultural Society in Helsinki