References
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- Goldman, C. R., 1968: The use of absolute activity for elimination serious errors in the measurements of primary productivity with C14. — J. Cons. Intern. I'Explor. Mer. 32, 172–179.
- Steemann Nielsen, E., 1952: The use of radio-active carbon (C14) for measuring organic production in the sea. — Ibidem 18, 117–140.
- Steemann Nielsen, E., 1965: On the determination of the activity in 14C-ampoules for measuring primary production. — Limnol. Oceanogr. 10, Supplement R 247–R 252.
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- Ward, F. J. & Nakanishi, M., 1971: A comparison of Geiger-Mueller and liquid scintillation counting methods in estimating primary productivity. — Limnol. Oceanogr. 16, 560–563.