Não informado. (1967). Journal of Differential Geometry. American Mathematical Society.
Chicago-viite (17. p.)Não informado. Journal of Differential Geometry. Bethlehem, Pa: American Mathematical Society, 1967.
MLA-viite (8. p.)Não informado. Journal of Differential Geometry. American Mathematical Society, 1967.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.