3 treff

Monotone iterative techniques for discontinuous nonlinear differential equations
Seppo Heikkilä, V. Lakshmikantham
Bok Engelsk 1994
On functional differential equations with advanced and retarded arguments
Seppo Heikkilä and Seppo Seikkala
Bok Engelsk 1983
On the complete integrability of the first order total differential equations
Heikkilä, Seppo
Bok Språk ikke angitt 1971