1. Wegmann, C. E.: C. R. Soc. Geol. Fr. 5 pt. 2: 477
2. Cloos, E.: Trans. Am. Geophys. Union 28: 626 (1947)
3. Similar ideas have also been put forward by Gurevich, G. I.: Bull. (Izv.) Akad. Nauk SSSR. Ser. Geofiz. 1954:411 (1954)
4. Ramberg, H.: J. Geol. 63: 512 (1955)
5. Ramberg, H.: Nor. Geol. Tidsskr. 39: 99 (1959)