Não informado. (2003). Differential Geometry and its Applications. North-Holland.
Chicago-viite (17. p.)Não informado. Differential Geometry and Its Applications. Amsterdam: North-Holland, 2003.
MLA-viite (8. p.)Não informado. Differential Geometry and Its Applications. North-Holland, 2003.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.