@article{SM_1992_73_2_a16,
     author = {D. I. Panyushev},
     title = {The canonical module of a~quasihomogeneous normal affine $SL_2$-variety},
     journal = {Sbornik. Mathematics},
     pages = {569--578},
     publisher = {mathdoc},
     volume = {73},
     number = {2},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1992_73_2_a16/}
}