On admissible boundary conditions at an irregular singular point for systems of linear ordinary differential equations
1983 ◽
Vol 23
(4)
◽
pp. 23-35
1971 ◽
Vol 11
(1)
◽
pp. 363-367
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1971 ◽
Vol 40
(0)
◽
pp. 11-62
◽
1994 ◽
Vol 109
(1)
◽
pp. 201-221
◽
2020 ◽
Vol 87
(3-4)
◽
pp. 261
1987 ◽
Vol 27
(3)
◽
pp. 132-146
2010 ◽
Vol 10
(01)
◽
pp. 77-89
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