Beyn, Wolf-Jürgen ; Albrecht, Julius (Ed.) ; Collatz, L. (Ed.) ; Kirchgässner, K. (Ed.)
In: Constructive methods for nonlinear boundary value problems and nonlinear oscillations: conference at the Oberwolfach Mathematical Research Institute, Black Forest, November 19 - 25, 1978, Vol. 48, page 9-19
1978