1. Observation of the optical analog of the Mössbauer effect in ruby;Szabo;Phys. Rev. Lett.,1971
2. Frequency selective optical memory, US patent 3 896 420;Szabo,1975
3. Frequency selective optical data storage system, US patent 4 101 976;Castro,1978
4. Hole burning in the contour of a pure electronic line in a Shpol'skii system;Gorokhovskii;JETP Lett.,1974
5. Stable “gap” in absorption spectra of solid solutions of organic molecules by laser irradiation;Kharlamov;Opt. Commun.,1974