| Publication Type: | Journal Article |
| Year of Publication: | 2011 |
| Authors: | A. Ilcheva, Motchurova-Dekova N. |
| Journal: | Review of the Bulgarian Geological Society |
| Volume: | 72 |
| Pagination: | 129–140 |
| URL: | http://www.bgd.bg/REVIEW{\_}BGS/REVIEW{\_}BGD{\_}2011/PDF/13{\_}Ilcheva{\_}Review{\_}2011.pdf |