Algebraic foundations of the theory of singularly perturbed equations
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1999 ◽
Vol 155
(1)
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pp. 133-152
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1992 ◽
Vol 62
(2)
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pp. 2664-2689
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1961 ◽
Vol 3
(1)
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pp. 18-24
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2015 ◽
Vol 20
(5)
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pp. 158-167
1973 ◽
Vol 24
(4)
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pp. 562-574
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1985 ◽
Vol 25
(2)
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pp. 182-186
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