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Îðèãèíàë: Ìîðîçîâ À Þ «Íàä ÷åì ðàáîòàþò â òåîðèè ñòðóí» ÓÔÍ 158 543–545 (1989); DOI: 10.3367/UFNr.0158.198907j.0543