On the Paleozoic series of Bear Island, especially on the Heclahook system - 1920
A Lower Ordovician fauna from the Smøla Island, Norway - 1932
The Middle Ordovician of the Oslo Region, Norway 2. Some Rugose and Tabulate Corals. - 1953
The Middle Ordovician of the Oslo region, Norway - 1953
Middle Cambrian stratigraphy in the Röyken area, Oslo region - 1954
The Middle Ordovician of the Oslo region, Norway 5. The Trilobite Family Styginidae - 1955
The middle ordovician of the Oslo region, Norway 10. Nautiloid Cephalopods - 1958
The Middle Ordovician of the Oslo region, Norway: 12, Notostraca and Conchastraca - 1960
The Middle Ordovician of the Oslo region, Norway: 11, Pelecypoda - 1960
The Species Streptis Monilifera (M'Coy) - 1960
A new silicified coral from the Upper Ordovician of the Oslo Region - 1961
Early Ordovician gastropods from the Oslo Region, Norway - 1962
A new scorpion from the Upper Carboniferous of Siberia - 1963
The Middle Ordovician of the Oslo Region, Norway. 15. Monoplacophora and Gastropoda - 1963
Gastropods from the Otta Conglomerate - 1963
The middle Ordovician of the Oslo region, Norway 19. The trilobite family Odontopleuridae - 1965
The Occurrence of Streptis (Brachiopoda) in the Ordovician of the inner Oslo Fjord - 1965
Fragments of a Middle Jurassic flora from Northern Trondelag, Norway - 1970
The middle Ordovician of the Oslo region, Norway 23. The Triolobite Family Proetidae - 1970
Ordovician Proetidae (Trilobita) from Scandinavia - 1973
Thelodonts from the upper Silurian of Ringerike, Norway - 1974
Thelodonts from the upper Silurian of Ringerike, Norway - 1974
New lower Palaeozoic streptelasmatid corals from Scandinavia - 1975
Upper Ordovician bivalves from the Oslo Region, Norway - 1975
Redescription of a Lower Cambrian eodiscid trilobite from Norway - 1976
Two new gastropod genera from the Lower Silurian of the Oslo Region, Norway - 1976
The Middle Ordovician of the Oslo Region, Norway, 27. Trilobites of the Family Calymenidae - 1976
Monoplacophora (Mollusca) from the Upper Ordovician of Norway - 1977
The upper Ordovician succession at Norderhov and on Frognøya in Ringerike, Norway - 1978
Late Caradoc - early Asghill trilobite distribution in the central Oslo Region, Norway - 1979
Platysolenites, other animal fossils, and the Precambrian-Cambrian transition in Norway - 1979
The presence of a bothriocidarid (Echinoid) in the Ordovician of Norway - 1980
Late Ordovician bryozoa from Ringerike, Norway - 1980
Scenella barrandei (Mollusca) from the Middle Cambrian of Baltoscandia - 1986
Norwegian Upper Ordovician illaenid trilobites - 1988
The Ordovician trilobite genus Robergia Wiman, 1905 and some other species hitherto included - 1991
Permian stratigraphy of the Svalis Dome south-western Barents Sea - 1996
Upper Ordovician - Lower Silurian strata and biota from offshore South Norway - 1997
Bucaniidae (Gastropoda) from the Upper Ordovician of Norway - 1999
Homeomorphic gastropods from the Silurian of Norway, Estonia and Bohemia - 1999
Isostrophic molluscs (Tergomya and Gastropoda) from the Upper Ordovician of Norway - 2000
Clitambonitoid brachiopods from the Middle and Upper Ordovician of the Oslo Region, Norway - 2000