@article{IM_1989__97_2_143693,
     author = {M.S. Narasimhan and J.-M. Drezet},
     title = {Groupe de {Picard} des vari\'et\'es de modules de fibr\'es semi-stables sur les courbes alg\'ebriques.},
     journal = {Inventiones mathematicae},
     pages = {53--94},
     publisher = {mathdoc},
     volume = {97},
     number = {2},
     year = {1989},
     zbl = {0689.14012},
     url = {http://geodesic.mathdoc.fr/item/IM_1989__97_2_143693/}
}