@conference {Zobac_EBT_2003, title = {Marking of Welded Pieces Using Continuous or Pulsed Electron Beam}, booktitle = {Proceedings of the 7th International Conference on Electron Beam Technologies}, year = {2003}, pages = {191{\textendash}197}, publisher = {Bulgarian Academy of Sciencies}, organization = {Bulgarian Academy of Sciencies}, address = {Varna}, author = {Martin Zoba{\v c}}, editor = {Georgy Mladenov} }