@article{IM2_1992_38_2_a9,
     author = {P. I. Katsylo},
     title = {Birational geometry of moduli varieties of vector bundles over $\mathbf P^2$},
     journal = {Izvestiya. Mathematics},
     pages = {419--428},
     year = {1992},
     volume = {38},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1992_38_2_a9/}
}