@article{oai:tsukuba.repo.nii.ac.jp:00017276, author = {Kang, Hong Jae and Tasaki, Hiroyuki}, issue = {1}, journal = {Tsukuba Journal of Mathematics}, month = {Jun}, pages = {155--164}, title = {Integral geometry of real surfaces in complex projective spaces}, volume = {25}, year = {2001} }