@article{RM_1980_35_1_a5,
     author = {A. G. Grigoryan},
     title = {$\Pi$-flat families of functors},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {213--214},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1980_35_1_a5/}
}