Long-lived stimulated light echo due to hyperfine structure in an ensemble of two-level systems

Modified stimulated photon echo with hyperfine structure of resonant levels

Polarization properties of stimulated photon echo with the hyperfine structure of resonance levels taken into account

Photon echoes stimulated from long-lived ordered populations in multi-level systems. The effect of intersystem crossing and optical branching

Long-lived stimulated photon echo in optically thick van vleck paramagnets

Photon echo formed on resonance levels with hyperfine structure at arbitrary cross sections of the exciting pulses

Forward, backward, and long-lived stimulated photon echoes in gases (A)