Efficient near-infra-red generation by four-wave mixing in barium vapour

Observations of four-wave mixing processes in barium vapour

Four-wave mixing in barium (A)

Two-photon resonant four-wave mixing processes in atomic barium

Resonantly enhanced parametric four-wave mixing in sodium vapour

Slow light via four-wave mixing in a hot rubidium vapour

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