@article{ZNSL_1981_112_a5,
     author = {M. B. Zvyagina},
     title = {Isomorphism of one-place functors~$\operatorname{Ext}$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {71--74},
     publisher = {mathdoc},
     volume = {112},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1981_112_a5/}
}