@article{oai:tsukuba.repo.nii.ac.jp:00017136,
 author = {Suceava, Bogdan},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {311--320},
 title = {The Chen invariants of warped products of hyperbolic planes and their applications to immersibility problems},
 volume = {25},
 year = {2001}
}