1. Banno, S. (1965): Japan Jour. Geol. Geogr. (in press).
2. Borg, I. (1956): Bull. Geol. Soc. Amer., 67, 1563-1584.
3. Chesnokov, B. V. (1959): Int. Geol. Rev., 2, 936-945.
4. Eskola, P. (1921): Vid. Skrift. I. Mat.-Naturv., No. 10, 1-158.
5. Milashev, V. A., Kritoyrskij, M. A., Radkin, M. I., and Erlich, E. N. (1963): Tr. Nauch-Issled. Inst. Geol. Arktiki,, 126, 1-125 (in Russian).