@article{Hiraki_2012, title={Evaluation of isotopic fractionation of oxygen ions escaping from terrestrial thermosphere}, volume={84}, ISSN={0016-7037}, url={http://dx.doi.org/10.1016/j.gca.2012.02.010}, DOI={10.1016/j.gca.2012.02.010}, journal={Geochimica et Cosmochimica Acta}, publisher={Elsevier BV}, author={Hiraki, Yasutaka and Yamada, Akinori and Kasai, Yasuko and Seta, Takamasa and Ozima, Minoru}, year={2012}, month=may, pages={525–533} }