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@article{MZM_1998_63_1_a14, author = {V. G. Zvyagin}, title = {The set of critical values of a potential {Fredholm} functional}, journal = {Matemati\v{c}eskie zametki}, pages = {133--135}, publisher = {mathdoc}, volume = {63}, number = {1}, year = {1998}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1998_63_1_a14/} }
V. G. Zvyagin. The set of critical values of a potential Fredholm functional. Matematičeskie zametki, Tome 63 (1998) no. 1, pp. 133-135. http://geodesic.mathdoc.fr/item/MZM_1998_63_1_a14/
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