@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039979, author = {Saito, Takeshi}, issue = {1}, journal = {Journal of mathematical sciences, the University of Tokyo}, month = {Feb}, pages = {387--441}, title = {Characteristic Cycle and the Euler Number of a Constructible Sheaf on a Surface}, volume = {22}, year = {2015} }