@article{IM_1989__96_1_143673,
     author = {L.L. Avramov},
     title = {Modules of finite virtual projective dimension.},
     journal = {Inventiones mathematicae},
     pages = {71--102},
     publisher = {mathdoc},
     volume = {96},
     number = {1},
     year = {1989},
     zbl = {0677.13004},
     url = {http://geodesic.mathdoc.fr/item/IM_1989__96_1_143673/}
}