Template:Gaarder, 1954
- Gaarder, K.R. 1954. Coccolithineae, Silicoflagellatae, Pterospermataceae and other forms from the 'Michael Sars' North Atlantic Deep Sea Expedition 1910. Report on the scientific results of the "Michael Sars" north Atlantic deep-sea expedition 1910 2: 1–20.