@article{TMF_1990_84_1_a11,
     author = {A. K. Arzhnikov and S. G. Novokshonov},
     title = {Cluster generalization of~the coherent-potential approximation on~the basis of~the projection formalism in~an~augmented space},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {128--140},
     publisher = {mathdoc},
     volume = {84},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_84_1_a11/}
}