no. 4

Linearization of group stack actions and the Picard group of the moduli of SL r /μ s -bundles on a curve
Bulletin de la Société Mathématique de France, Tome 125 (1997) no. 4, pp. 529-545. 
@article{BSMF_1997__125_4_529_0,
     author = {Laszlo, Yves},
     title = {Linearization of group stack actions and the Picard group of the moduli of $SL_r/\mu _s$-bundles on a curve},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {529--545},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {125},
     number = {4},
     year = {1997},
     doi = {10.24033/bsmf.2316},
     zbl = {0936.14024},
     mrnumber = {99h:14008},
     language = {en},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.2316/}
}
Laszlo, Yves. Linearization of group stack actions and the Picard group of the moduli of $SL_r/\mu _s$-bundles on a curve. Bulletin de la Société Mathématique de France, Tome 125 (1997) no. 4, pp. 529-545. doi : 10.24033/bsmf.2316. http://archive.numdam.org/articles/10.24033/bsmf.2316/

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