1. Measurement of electron impact optical excitation functions;Heddle;Rev. Mod. Phys.,1989
2. On near threshold cross sections at electron-atom collisions;Shpenik;Opt. Spectrosc.,1967
3. Investigation of resonances in the total cross sections for excitation of mercury atoms by monoenergetic electrons;Shpenik;JETP,1975
4. Hypocycloidal electron spectrometer for studying elastic and inelastic electron backscattering from atoms, molecules and solid surfaces;Shpenik;Instrum. Exp. Tech.,1998