@conference {Dora_EBT_2003, title = {A new generation of power supplies for electron beam welding machines}, booktitle = {Proceedings of the 7th International Conference on Electron Beam Technologies}, year = {2003}, pages = {631{\textendash}632}, publisher = {Bulgarian Academy of Sciencies}, organization = {Bulgarian Academy of Sciencies}, address = {Varna}, author = {J. Dora and J. Felba and W. Sielanko}, editor = {Georgy Mladenov} }