Two-photon resonant four-wave mixing in atomic sodium vapour

Resonantly enhanced parametric four-wave mixing in sodium vapour

Conical four-wave mixing in sodium vapour excited by femtosecond laser pulses

Third harmonic generation and four-wave parametric mixing in sodium vapour

Two-Photon Resonant Parametric and Wave-Mixing Processes in Atomic Sodium

Picosecond phase-conjugation by degenerate four-wave mixing in sodium vapour

Atomic Coherence Effects in Resonant Four-Wave Mixing Spectroscopy of Sodium