Ulrik Gregersen

Lower Pliocene dinoflagellate cysts from cored Utsira Formation in the Viking Graben, northern North Sea

Peter N. Johannessen, Stefan Piasecki, U. Gregersen, 2002 .

Stratigraphy and facies distribution of the Utsira formation and the Pliocene sequences in the northern North Sea

Olaf Michelsen, U. Gregersen, Ulrik Gregersen, 1997 .

High-frequency sequence stratigraphy of Upper Cenozoic deposits in the central and southeastern North Sea areas

Olaf Michelsen, U. Gregersen, Ulrik Gregersen, 1997 .