Simon Tam and Mario E. Fajardo, Observation of the high resolution infrared absorption spectrum of CO₂ molecules isolated in solid parahydrogen: Low-Temperature Physics and Chemistry in Cryomatrice, Low Temp. Phys. 26, (2000) [Fiz. Nizk. Temp. 26, 889-898, (2000)] DOI: https://doi.org/10.1063/1.1312391.