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Litak, R. K.; Marchant, R. H.; Pfiffner, Othmar-Adrian; Brown, L. D.; Sellami, Souad; Levato, L.; Wagner, J.-J.; Olivier, R. (1993). Crustal structure and reflectivity of the Swiss Alps from three-dimensional seismic modeling: 2. Penninic Nappes. Tectonics, 12(4), pp. 925-935. American Geophysical Union, European Geophysical Society 10.1029/93TC00363
Frei, W.; Hertzmann, P.; Lehner, P.; Müller, Stefanie; Olivier, R.; Pfiffner, Othmar-Adrian; Steck, A.; Valasek, P. (1989). Geotraverses across the Swiss Alps. Nature, 340(6234), pp. 544-548. Macmillan Journals Ltd. 10.1038/340544a0
