Further Reading
- Bryant, Chern, Gardner, Goldschmidt, Griffiths, Exterior Differential Systems, Mathematical Sciences Research Institute Publications, Springer-Verlag, ISBN 0-387-97411-3
- Olver, P., Equivalence, Invariants, and Symmetry, Cambridge, ISBN 0-521-47811-1
- Ivey, T., Landsberg, J.M., Cartan for Beginners: Differential Geometry via Moving Frames and Exterior Differential Systems, American Mathematical Society, ISBN 0-8218-3375-8
Read more about this topic: Integrability Conditions For Differential Systems
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