@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}
}