@article{IM2_1994_42_2_a0,
     author = {A. I. Bondal and A. E. Polishchuk},
     title = {Homological properties of associative algebras: the method of helices},
     journal = {Izvestiya. Mathematics},
     pages = {219--260},
     year = {1994},
     volume = {42},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1994_42_2_a0/}
}