1. Thermionic sources for high-brightness electron beams
2. A. Figner, A. Soloveichik and I. Judinskaya, Metal Porous Body Having Pores Filled with Barium Scandate, US Patent, filed 10-1964, granted 12-1967.
3. Activation and early life of a pressed barium scandate cathode
4. A. van Stratum, J. van Os, J.R. Blatter and P. Zalm, Barium-Aluminum-Scandate Dispenser Cathode, US-Patent 4007393, granted 8-2-1977, priority 21-2-1975.