@article{oai:tsukuba.repo.nii.ac.jp:00007517,
 author = {Iwasaki, Yoichi and 岩崎, 洋一},
 issue = {1},
 journal = {Physical review D},
 month = {Jul},
 note = {In order to test the existence of X(2.8) and the validity of interpreting it as a pseudoscalar c ̅c meson, and also to test the existence of a possible state c ̅c c ̅c, it is proposed to measure the recoil-mass spectrum against J/ψ(3.1) at the c.m. energy about 6 GeV in e+e- annihilation. This also serves to check the Okubo-Zweig-Iizuka rule.},
 pages = {220--222},
 title = {How to find ηc and a possible state c ̅c c ̅c},
 volume = {16},
 year = {1977}
}