@article{DAN_1960_131_6_a1,
     author = {D. O. Baladze},
     title = {Homology and cohomology groups over a pair of coefficient groups},
     journal = {Doklady Akademii Nauk},
     pages = {1234--1237},
     publisher = {mathdoc},
     volume = {131},
     number = {6},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_131_6_a1/}
}