@article{MZM_1980_28_5_a11,
     author = {E. G. Sklyarenko},
     title = {Poincar\'e duality and relations between the functors {Ext} {and~Tor}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {769--776},
     year = {1980},
     volume = {28},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_5_a11/}
}