%0 conference paper %@ %A Kaiser, H., Singer, W., Weichert, G., Gonin,I., Jelezov, I., Khabiboulline, T., Kuchtiev, W., Brokmeier, H.-G., Priesmeyer, H.-G. %D 1998 %J Proceedings of HEACC 1998 %T Hydroforming of seamless niobium cavity of TESLA shape %U %X