1. Families of lift and contact transformations;Sewell;Proc. R. Soc. Lond. Ser. A,1994
2. Legendre transformations and extremum principles;Sewell,1982
3. Maximum and Minimum Principles. A Unified Approach, with Applications;Sewell,1987
4. Some applications of transformation theory in mechanics;Sewell,2002
5. Are there higher-accuracy analogues of semi-geostrophic theory?;McIntyre,2002