@article{IM2_1999_63_1_a4,
     author = {B. V. Karpov},
     title = {$S$-duality testing and exceptional bundles},
     journal = {Izvestiya. Mathematics },
     pages = {103--117},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1999_63_1_a4/}
}