PACS: 95.30.Sf, 98.54.Aj, 98.65.−r, 95.35.+d (all)
DOI: 10.1070/PU1991v034n02ABEH002486
URL: https://ufn.ru/en/articles/1991/2/l/
Citation: Zel’nikov M I "Gravitational lenses" Sov. Phys. Usp. 34 (2) 211–211 (1991)

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