Problem Book for First Year Calculus

by Bluman, George W.
Published 1984

Symmetry and Integration Methods for Differential Equations

by Bluman, George, Anco, Stephen
Published 2002

Symmetries and Differential Equations

by Bluman, George W., Kumei, Sukeyuki
Published 1989

Applications of Symmetry Methods to Partial Differential Equations

by Bluman, George W., Cheviakov, Alexei F., Anco, Stephen
Published 2010