S. Kudryashov, P. Danilov, N. Smirnov and V. Kovalov, Vibrational anharmonicity of A-band related optical center and its temperature dependence studied by femtosecond laser excitation in bulk natural diamond, Comm. Phys. 34 (2024) 1. DOI: https://doi.org/10.15625/0868-3166/19292.