@article{TMF_1971_6_3_a11,
     author = {Yu. B. Gaididei and \`E. G. Petrov},
     title = {Theory of~band and bound states of~double triplet excitations in~molecular {crystals.~I}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {433--444},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_6_3_a11/}
}