edited by R. Bulirsch, W. Oettli, and J. Stoer. edited by R. Bulirsch, R. D. Grigorieff, and J. Schroder. edited by W. Bertsch, W.G. Jennings, R.E. Kaiser. edited by R. Bergere, S. Costa, C. Schaerf. edited by R. Buscall, T. Corner, and J.F. Stageman. edited by W. Oettli and K. Ritter. edited by R. Mittra, W.A. Imbriale, E.J. Maanders. edited by G.G. Birch, N. Blakebrough and K.J. Parker. edited by L. Fiermans, J. Vennik, and W. Dekeyser.