The Albian ammonites, nannofosils and sequence stratigraphy in Bulgaria

by Ivanov, Marin, Stojkova, Kristalina
Source: 1. Mineralia Slovaca 1. 0369-2086 1. Roč. 29, č. 4-5(1997), s. 295

Tithonian to Valanginian bioevents and integrated zonation on calpionellids, calcareous nannofossils and calcareous dinocysts from the Western Balcanides, Bulgaria

by Lakova, Iskra, Ivanova, Daria, Stojkova, Kristalina
Source: 1. Mineralia Slovaca 1. 0369-2086 1. Roč. 29, č. 4-5(1997), s. 301-303