scientific article; zbMATH DE number 3359265
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Publication:5633174
zbMath0226.49005MaRDI QIDQ5633174
Publication date: 1971
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Existence theories for problems in abstract spaces (49J27) Special ordinary differential equations (Mathieu, Hill, Bessel, etc.) (34B30)
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