A group-theoretic method of differential geometric investigation
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1979 ◽
Vol 15
(10)
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pp. 795-803
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2002 ◽
Vol 147
(2)
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pp. 385-395
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2008 ◽
Vol 32
(6)
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pp. 1099-1114
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2006 ◽
Vol 58
(3)
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pp. 416-430
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