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Balser, W.; Jurkat, W. B.; Lutz, D. A. Transfer of connection problems for meromorphic differential equations of rank \(r\geq 2\) and representations of solutions. (English) Zbl 0483.34009 J. Math. Anal. Appl. 85, 488-542 (1982). MSC: 34M05 34A12 PDFBibTeX XMLCite \textit{W. Balser} et al., J. Math. Anal. Appl. 85, 488--542 (1982; Zbl 0483.34009) Full Text: DOI
Balser, W.; Jurkat, W. B.; Lutz, D. A. A general theory of invariants for meromorphic differential equations. II: Proper invariants. (English) Zbl 0473.34028 Funkc. Ekvacioj, Ser. Int. 22, 257-283 (1979). MSC: 34E05 34M05 34A30 PDFBibTeX XMLCite \textit{W. Balser} et al., Funkc. Ekvacioj, Ser. Int. 22, 257--283 (1979; Zbl 0473.34028)