1. AEMET 2016 Agencia Estatal de Meteorología http://www.aemet.es/es/portada
2. AEMET 2015 Manual de uso de términos meteorológicos. Edición 2015 http://www.aemet.es/documentos/es/eltiempo/prediccion/comun/Manual_de_uso_de_terminos_met_2015.pdf
3. High-resolution seismic and resistivity profiling of a buried Quaternary subglacial valley: northern Alberta, Canada;Ahmad;Geological Society of America Bulletin,2009
4. Alberta Government 2005 Code of practice for exploration operations (made under the Environmental Protection and Enhancement Act, RSA 2000, c.E-12, as amended and Conservation and Reclamation Regulation (AR 115/93), as amended). Published by Alberta Queen's Printer
5. ASPRS Positional Accuracy Standards for Digital Geospatial Data;ASPRS;Photogrammetric Engineering & Remote Sensing,2014