@article{oai:tsukuba.repo.nii.ac.jp:00007518,
 author = {Iwasaki, Yoichi and 岩崎, 洋一},
 issue = {4},
 journal = {Physical review D},
 month = {Feb},
 note = {We derive a theorem on the coupling of the trace of the energy-momentum tensor to two photons.},
 pages = {1172--1172},
 title = {Coupling of the trace of the energy-momentum tensor to two photons},
 volume = {15},
 year = {1977}
}