@article{CM_1996__104_2_107_0, author = {Assi, A. and Castro-Jim\'enez, F. J. and Granger, J. M.}, title = {How to calculate the slopes of a $D$-module}, journal = {Compositio Mathematica}, pages = {107--123}, publisher = {Kluwer Academic Publishers}, volume = {104}, number = {2}, year = {1996}, zbl = {0862.32005}, mrnumber = {1421395}, language = {en}, url = {http://www.numdam.org/item/CM_1996__104_2_107_0/} }