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@article{MZM_1980_28_4_a2, author = {V. S. Gerdjikov and E. Kh. Khristov}, title = {Expansions in products of solutions of two {Dirac} systems}, journal = {Matemati\v{c}eskie zametki}, pages = {501--512}, publisher = {mathdoc}, volume = {28}, number = {4}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_4_a2/} }
V. S. Gerdjikov; E. Kh. Khristov. Expansions in products of solutions of two Dirac systems. Matematičeskie zametki, Tome 28 (1980) no. 4, pp. 501-512. http://geodesic.mathdoc.fr/item/MZM_1980_28_4_a2/