Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Tsuyoshi Tanaka and H. Shimizu and Akimasa Masuda,Meteoritic 138Ce/142Ce ratio and its evolution,Nature,0028-0836,Springer Science and Business Media LLC,1984-01-01,307,,251-252,https://cir.nii.ac.jp/crid/1873398392910685568,https://doi.org/10.1038/307251a0