@conference {Koleva_EBT_2009,
	title = {Quality Characterization of Electron Beams},
	booktitle = {Proceedings of the 9th International Conference on Electron Beam Technologies},
	year = {2009},
	pages = {64{\textendash}69},
	publisher = {Bulgarian Academy of Sciencies},
	organization = {Bulgarian Academy of Sciencies},
	address = {Varna},
	issn = {0861-4717},
	author = {Elena Koleva and Georgy Mladenov and K. Garkova and M. Kardjiev},
	editor = {Georgy Mladenov}
}