Rousaki, Anastasia, et al. “Micro-Raman Spectroscopy for the Analysis of Materials Found in Rock Art Shelters in Piedra Parada Valley, Chubut Province, Argentinian Patagonia.” JOURNAL OF RAMAN SPECTROSCOPY, vol. 53, no. 3, 2022, pp. 570–81, doi:10.1002/jrs.6253.