Episodes 2004; 27(2): 101-106
Published online June 1, 2004
Copyright © International Union of Geological Sciences.
Faculty of Geology, Moscow State University, 119899 Moscow, Russia. E-mail: firstname.lastname@example.org
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.