| References | |
| Cortés 2002 | Cortés A.L., Diaz-Martínez E., Sanz-Rubio E., Martínez-Frías J. and Fernández C., ''Cosmic impact versus terrestrial origin of the Azuara structure (Spain): A review'', MAPS 37 (2002) |
| Ernstson 2001 | Ernstson K., Claudin F. et al., ''Impact melt rocks, shock metamorphism, and structural features in the Rubielos de la Cérida structure, Spain'', Abs., 6th ESF IMPACT workshop, Impact Markers in the Stratigraphic record, pp. 23-24 (2001) |
| Ernstson 2002 | Ernstson K., Claudin F., Schüssler U. and Hradil K., "The mid-Tertiary Azuara and Rubielos de la Cérida paired impact structures (Spain)", Treballs del Museu de Geologia de Barcelona, Núm 11, Separata (2002) |
| Hradil 2001 | Hradil K. et al., Abs., 6th ESF IMPACT workshop, Impact Markers in the Stratigraphic record, pp. 49-50 (2001) |
| Impact-structures.com | "Ernstson Claudin Impact Structures" website. (checked 16 Feb 2010) |
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