Eastern Finnish dialects are chiefly vested in the Savonians (the Savonian dialects) and the Karelians (the southeast Finnish dialects). One of the Finnish language spoken group, the North Karelian, represents the East Finnish dialects, however this distinction is not established in any case. Other dialects, such as the North Finnish dialects, are considered as East or West Finnish dialects. Kalevala, one of the earliest and most significant works of Finnish literature, was written in East Finnish and East Finnish features were used extensively in the Finnish language standardization.