Biostratigraphic (graptolites, chitinozoans, acritarchs, brachiopods) and chemostratigraphic (delta13C) correlations between latest Ordovician strata in Laurentia and BalticaDelabroye, A.; Vecoli, M.; Nõlvak, Jaak; Uutela, AThe Seventh Baltic Stratigraphical Conference : 17-18 May 2008, Tallinn, Estonia : abstracts & field guide2008 / p. 15

Microfossil dynamics and biostratigraphy in the Väo Formation (Darriwilian) of NW EstoniaKilling, Mairy; Hints, Olle; Nõlvak, Jaak; Vecoli, M.; Viira, ViiveThe Seventh Baltic Stratigraphical Conference : 17-18 May 2008, Tallinn, Estonia : abstracts & field guide2008 / p. 35

The Great Ordovician Biodiversification Event: Linked to phytoplankton evolution or to asteroid impacts?Servais, T.; Hints, Olle; Kröger, Björn; Nõlvak, Jaak; Vecoli, M.; Wallin, A.The Seventh Baltic Stratigraphical Conference : 17-18 May 2008, Tallinn, Estonia : abstracts & field guide2008 / p. 63