1
by Hilbert, David, Schmidt, Erhard
Published 1989
Springer Vienna

2
by Courant, Richard, Hilbert, David
Published 1937
Springer Berlin Heidelberg

3
by Courant, Richard, Hilbert, David
Published 1924
Springer Berlin Heidelberg

4
by Courant, Richard, Hilbert, David
Published 1993
Springer Berlin Heidelberg

5
by Hilbert, David, Schmidt, Erhard
Published 1989
Vieweg+Teubner Verlag