Stephani, Hans.
Differential Equations: Their Solutions Using Symmetries - Cambridge CUP 1989 - 260
0-521-36689-5
Differential equations
Symmetry
517.9 STE
Differential Equations: Their Solutions Using Symmetries - Cambridge CUP 1989 - 260
0-521-36689-5
Differential equations
Symmetry
517.9 STE