Cheng, H., Edmonds, H. N., Edwards, R. L., Hoff, J. A., Moran, S. B., Shen, C., & Thomas, R. B. Measurement of attogram quantities of 231Pa in dissolved and particulate fractions of seawater by isotope dilution thermal ionization mass spectroscopy.

Cheng, Hai., Henrietta N. Edmonds, R. Lawrence Edwards, John A. Hoff, S. Bradley Moran, Chuan-Chou Shen, và Rebecca B. Thomas. Measurement of Attogram Quantities of 231Pa in Dissolved and Particulate Fractions of Seawater By Isotope Dilution Thermal Ionization Mass Spectroscopy.

Cheng, Hai., et al. Measurement of Attogram Quantities of 231Pa in Dissolved and Particulate Fractions of Seawater By Isotope Dilution Thermal Ionization Mass Spectroscopy.