Soviet–Lithuanian Mutual Assistance Treaty (English Wikipedia)

Senn, Alfred Erich (2007). Lithuania 1940: Revolution from Above. On the Boundary of Two Worlds: Identity, Freedom, and Moral Imagination in the Baltics. Rodopi. p. 10. ISBN 978-90-420-2225-6.
Vardys, Vytas Stanley; Judith B. Sedaitis (1997). Lithuania: The Rebel Nation. Westview Series on the Post-Soviet Republics. WestviewPress. p. 47. ISBN 0-8133-1839-4.
Senn, Alfred Erich (2007). Lithuania 1940: Revolution from Above. On the Boundary of Two Worlds: Identity, Freedom, and Moral Imagination in the Baltics. Rodopi. p. 13. ISBN 978-90-420-2225-6.
Senn, Alfred Erich (2007). Lithuania 1940: Revolution from Above. On the Boundary of Two Worlds: Identity, Freedom, and Moral Imagination in the Baltics. Rodopi. pp. 40–41. ISBN 978-90-420-2225-6.
Triska, Jan F.; Robert M. Slusser (1962). The Theory, Law, and Policy of Soviet Treaties. Stanford University Press. p. 236. ISBN 0-8047-0122-9.
Senn, Alfred Erich (2007). Lithuania 1940: Revolution from Above. On the Boundary of Two Worlds: Identity, Freedom, and Moral Imagination in the Baltics. Rodopi. pp. 27–28. ISBN 978-90-420-2225-6.

books.google.com

Lane, Thomas (2001). Lithuania: Stepping Westward. Routledge. pp. 37–38. ISBN 0-415-26731-5.
Eidintas, Alfonsas; Vytautas Žalys; Alfred Erich Senn (September 1999). Ed. Edvardas Tuskenis (ed.). Lithuania in European Politics: The Years of the First Republic, 1918-1940 (Paperback ed.). New York: St. Martin's Press. pp. 108–110. ISBN 0-312-22458-3.
Raun, Toivo U. (2001). Estonia and the Estonians. Hoover Press. p. 139. ISBN 0-8179-2852-9.
Kershaw, Ian (2007). Fateful Choices: Ten Decisions that Changed the World, 1940–1941. Penguin Group. p. 259. ISBN 978-1-59420-123-3.
Shtromas, Alexander; Robert K. Faulkner; Daniel J. Mahoney (2003). Totalitarianism and the Prospects for World Order. Lexington Books. p. 246. ISBN 0-7391-0534-5.
Senn, Alfred Erich (2007). Lithuania 1940: Revolution from Above. On the Boundary of Two Worlds: Identity, Freedom, and Moral Imagination in the Baltics. Rodopi. pp. 15–21. ISBN 978-90-420-2225-6.
Johari, J.C. (2000). Soviet Diplomacy 1925–41. Anmol Publications. pp. 54–56. ISBN 81-7488-491-2.
Piotrowski, Tadeusz (1998). Poland's Holocaust: Ethnic Strife, Collaboration with Occupying Forces and Genocide in the Second Republic, 1918–1947. McFarland. pp. 161–162. ISBN 0-7864-0371-3.
Slusser, Robert M.; Jan F. Triska (1959). A Calendar of Soviet Treaties, 1917–1957. Stanford University Press. p. 131. ISBN 0-8047-0587-9.

Skirius, Juozas (2002). "Klaipėdos krašto aneksija 1939–1940 m.". Gimtoji istorija. Nuo 7 iki 12 klasės (in Lithuanian). Vilnius: Elektroninės leidybos namai. ISBN 9986-9216-9-4. Archived from the original on 2008-03-03. Retrieved 2008-03-14.
Skirius, Juozas (2002). "Vilniaus krašto atgavimas ir Lietuvos–SSRS santykiai 1939–1940 m.". Gimtoji istorija. Nuo 7 iki 12 klasės (in Lithuanian). Vilnius: Elektroninės leidybos namai. ISBN 9986-9216-9-4. Archived from the original on 2008-03-03. Retrieved 2008-11-02.

Gureckas, Algimantas. "Ar Lietuva galėjo išsigelbėti 1939–1940 metais?". lrytas.lt (in Lithuanian). Archived from the original on 15 January 2020. Retrieved 30 June 2010.

Skirius, Juozas (2002). "Klaipėdos krašto aneksija 1939–1940 m.". Gimtoji istorija. Nuo 7 iki 12 klasės (in Lithuanian). Vilnius: Elektroninės leidybos namai. ISBN 9986-9216-9-4. Archived from the original on 2008-03-03. Retrieved 2008-03-14.
Gureckas, Algimantas. "Ar Lietuva galėjo išsigelbėti 1939–1940 metais?". lrytas.lt (in Lithuanian). Archived from the original on 15 January 2020. Retrieved 30 June 2010.
Skirius, Juozas (2002). "Vilniaus krašto atgavimas ir Lietuvos–SSRS santykiai 1939–1940 m.". Gimtoji istorija. Nuo 7 iki 12 klasės (in Lithuanian). Vilnius: Elektroninės leidybos namai. ISBN 9986-9216-9-4. Archived from the original on 2008-03-03. Retrieved 2008-11-02.

Urbšys, Juozas (Summer 1989). "Lithuania and the Soviet Union 1939–1940: the Fateful Year". Lituanus. 2 (34). ISSN 0024-5089.
Łossowski, Piotr (2002). "The Lithuanian–Soviet Treaty of October 1939". Acta Poloniae Historica (86): 98–101. ISSN 0001-6829.