1. USSR Inventor's Certificate No. 248860 (1967);Donets;Byull. OIPOTZ No. 23,1969
2. M.P. Stockli, accepted for publication in Z. Phys. D.
3. Ion-collision experiments with slow, very highly charged ions extracted from an electron-beam ion trap
4. The Physics and Technology of Ion Sources;Donets,1989
5. Int. Conf. on Ion Sources;Donets,1989