TY - JOUR AU - Bucher, C AU - Lehmann, K AU - Plusquellic, David AU - Fraser, Gerald C2 - Applied Optics DA - 2000-06-01 LA - en M1 - 39 PB - Applied Optics PY - 2000 TI - Doppler-Free Nonlinear Absorption in Ethylene by Use of Continuous-Wave Cavity Ringdown Spectroscopy ER -