Debut, Alexis, Theofilos Toulkeridis, Andrea Vaca, and Carlos Arroyo. 2021. “Origin of Color Variations of Thin, Nano-Sized Layers of Volcanic Cinder from the Sierra Negra Volcano of the Galapagos Islands”. Uniciencia 35 (2), 1-13. https://doi.org/10.15359/ru.35-2.14.