@article{CTT100753802,
  author = {S. Okumura and S. Umehara and Y. Fujii and M. Nomura and T. Kaneshiki and M. Ozawa and T. Kishimoto},
  title = {Recent Studies on Ca Isotope Separation by Crown-Ether Resin Chromatography},
  journal = {J. Nucl. Radiochem. Sci},
  year = 2016,
}

@article{CTT100753800,
  author = {S. Umehara and S. Okumura and T. Kishimoto and Y. Fujii and M. Nomura and T. Kaneshiki and M. Ozawa},
  title = {Chromatographic Separation of Calcium Isotopes using Benzo-18-Crown-6-Ether Resin and Acetic Acid Solution},
  journal = {Austin Chromatography},
  year = 2016,
}

@article{CTT100753799,
  author = {S. Okumura and S. Umehara and Y. Fujii and M. Nomura},
  title = {Separation of Calcium-48 Isotope by Crown Ether Chromatography Using Ethanol/Hydrochloric Acid Mixed Solvent},
  journal = {Journal of Chromatography A},
  year = 2015,
}