@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039344, author = {Saeki, Osamu}, issue = {1}, journal = {Journal of the Faculty of Science, the University of Tokyo. Sect. 1 A, Mathematics = 東京大学理学部紀要. 第1類A, 数学}, month = {}, note = {application/pdf}, pages = {73--124}, title = {Simple stable maps of $3$-manifolds into surfaces II}, volume = {40}, year = {1993} }