@book{AST_1989__169-170__1_0, author = {Babbitt, D. G. and Varadarajan, V. S.}, title = {Local moduli for meromorphic differential equations}, series = {Ast\'erisque}, publisher = {Soci\'et\'e math\'ematique de France}, number = {169-170}, year = {1989}, mrnumber = {1014083}, zbl = {0683.34003}, language = {en}, url = {http://archive.numdam.org/item/AST_1989__169-170__1_0/} }