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Îðèãèíàë: Ðàãóëüñêèé   «Ýêñïåðèìåíòàëüíîå èññëåäîâàíèå îïòè÷åñêîé èçîòðîïèè ïðîñòðàíñòâà» ÓÔÍ 167 1022–1024 (1997); DOI: 10.3367/UFNr.0167.199709i.1022