1. Differential inhibition of respiration and dark CO2-fixation in Scenedesmus and Chlorella;Allen;Arch. Biochem,1947
2. On the preparation of carbon-14 from neutron irradiated aluminium nitride;Barakat;Atompraxis,1968
3. Radioactivity assay and specific activity determination of metallic carbonates-C14 by the flow monitoring counter;Barakat;Isotopenpraxis,1967
4. Isotopic Carbon;Calvin,1960
5. Isotopic Carbon;Calvin,1960