@article{oai:tsukuba.repo.nii.ac.jp:00017240,
 author = {Cavicchioli, Alberto and Hegenbarth, Friedrich and Repovs, Dusan},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Oct},
 pages = {333--342},
 title = {On four-manifolds fibering over surfaces},
 volume = {22},
 year = {1998}
}