@article{DAN_1979_247_5_a21,
     author = {L. V. Artamonov and A. M. Grekhov and A. B. Roitsin},
     title = {On the relation between direct and indirect exchanges in polyatomic systems},
     journal = {Doklady Akademii Nauk},
     pages = {1115--1119},
     publisher = {mathdoc},
     volume = {247},
     number = {5},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_247_5_a21/}
}