Formal solutions of scalar singularly-perturbed linear differential equations
1989 ◽
pp. 183-195
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2004 ◽
Vol 40
(5)
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pp. 641-651
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2017 ◽
Vol 83
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pp. 254-271
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1988 ◽
Vol 31
(1)
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pp. 107-126
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1999 ◽
Vol 28
(4-5)
◽
pp. 569-587
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