He studied history of ideas and has written many biographies of Norwegian people, amongst them Ola Thommessen, Elling M. Solheim and Øvre Richter Frich.
Tidens Tegn soon became one of the country's most important and largest newspapers, and many important cultural personalities were among the contributors, including Sven Elvestad, Olaf Bull, Hans E. Kinck, Herman Wildenvey, Nils Collett Vogt and Selma Lagerlöf.
Ola Jordan | Ola Dybwad-Olsen | Ola Thommessen | Ola Rotimi | Ola Raknes | Ola Mosafinn | Ola Hansson | Ola Englund | Ola Cohn | Music of the World Cup: Allez! Ola! Ole! | Beck-Ola | Rock-Ola | Ola Ullsten | Ola Tidman | Ola & the Janglers | Ola Snortheim | Ola Nordmann (song) | Ola Nordmann | Ola Magnell | Ola Kala | Ola Hanson | Ola Halén | Ola Bratteli | Ola Belle Reed | Ola | Festus Olabode Ola |