Exterior differential systems and Euler-Lagrange partial differential equations /

by Bryant, Robert L., Bryant, Robert L., Griffith, Phillip 1938-, Grossman, Daniel Andrew 1974-
Published 2003

Cartan for beginners : differential geometry via moving frames and exterior differential systems /

by Ivey, Thomas A.
Published 2016

From Frenet to Cartan : the method of moving frames /

by Clelland, Jeanne N.
Published 2017