(1)
Debajyoti Roy, P.; Morton-Bermea, O.; Hernández-Álvarez, E.; Pi Puig, T.; Lozano Santa Cruz, R. Rare Earth Element Geochemistry of the Late Quaternary Tephra and Volcano-Clastic Sediments from the Pachuca Sub-Basin, North-Eastern Basin of Mexico. Geofis Int 2010, 49, 3-15.