1
by Collatz, L., Wetterling, W.
Published 1973
Birkhäuser
Table of Contents: ... Quadraturformeln -- Some Numerical Techniques for Optimal Control Governed by Partial Differential Equation...

2
by Collatz, L., Meinardus, G., Wetterling, W.
Published 1977
Birkhäuser
...International Series of Numerical Mathematics...