Memoirs of the American Mathematical Society, ISSN 1947-6221 ; Volume 227, Number 1067
Print version: Gonzalez-Enriquez, A. (Alejandra), 1967- Singularity theory for non-twist KAM tori. Providence, Rhode Island : American Mathematical Society, c2013 vi, 115 pages Memoirs of the American Mathematical Society ; Volume 227, Number 1067. ISBN 9780821890189