Fennell 2023, p. 286, One of the most important results of Semen's policy of firmness and friendship with Novgorod was the neutralization of Lithuanian influence in the north-west Russian lands. Fennell, John (15 November 2023). The Emergence of Moscow, 1304-1359. Univ of California Press. ISBN978-0-520-34759-5.
Feldbrugge 2009, p. 211, "Pskov is recognized as the patrimony (otchina) of the "grand prince, our lord, the Russian sovereign [russkii gosudar'/dem Ruschen keiser] Vasili Dmitrievich". Feldbrugge, Ferdinand Joseph Maria (2009). Law in Medieval Russia. BRILL. ISBN978-90-04-16985-2.