http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Symmetries and recursion operators for classical and supersymmetric differential equations
by I.S. Krasil'shchik and P.H.M. Kersten.
Includes bibliographical references (pages 373-378) and index.
Mathematics and its applications (Kluwer Academic Publishers) ; v. 507