E. Marin, L. A. Hernández-Carabalí, E. Cedeño, J. B. Rojas-Trigos, S. Alvarado, A. M. Mansanares, M. A. Isidro-Ojeda, E. Vargas, and A. Calderón, A comparison between thermal lens and conventional optical spectroscopy for monitoring of a photocatalytic process, Rev. Mex. Fís. 68, (2022).