Yu.A. Dmitriev and R.A. Zhitnikov, EPR spectra and rotation of CH₃, CH₂D, CHD₂, and CD₃ radicals in solid H₂, Low Temp. Phys. 29, (2003) [Fiz. Nizk. Temp. 29, 695-698, (2003)] DOI: https://doi.org/10.1063/1.1582334.