Main Science Fields of Interests and Research Activities:
Main Fields of Paleontological Interests and Research Activities:
Microfloral biostratigraphy and vegetation change in the Westphalian of the Dobrudzha Basin, NE Bulgaria. Review and development of Visean and early Namurian palynostratigraphy of the Irechek Formation, Dobrudzha Coal Basin. Late Devonian and early Carboniferous stratigraphy. Monosaccate and bisaccate pollen: evolutionary and phytogeographic significance. Growth habits and life straggles of Carboniferous and Permian pteridosperms. Taxonomy, biology, and ecology of the Late Palaeozoic coal swamp plants. Palynostratigraphy of the Borehole Novachene (Early Carboniferous), working Group of Shell Ltd. Pleven, Bulgaria). Palynostratigraphy of the Permian sequence of the Belogradchik and Mirovo exposed in Bulgaria. Stratigraphycal Subdivision of the Upper Carboniferous deposits of Bulgaria and of the U.S.S.R., Correlation program, Project of Ministry of geology,1985-1988. Paleozoic evolution of NW Gondvana, IGCP Project N. 351, 1994-1996. Comparative investigations of the Paleo-Alpine structures in the Apennines and Balkanides (Bulgarian- Italian), 1992-1995. Provenance of Westphalian strata in the coal-bearing sediments in the northern part of the Bulgarian Black Sea shelf - Cantabrian palynology. Palynology of the Cape Breton Coal Basin, Canada (NATO Project 272). Distribution of miospores through coals and shales of the Coal Measures sequence exposed in South Wales (IGCP Project 469). Climatic and Vegetational Changes in the Late Carboniferous tropical belt.