Ruderfer, V. I. On the zeros of solutions of a linear analytic partial differential equation of arbitrary order. (English) Zbl 0444.35079 Math. USSR, Sb. 37, 403-410 (1980). MSC: 35R25 35A10 35B05 35E20 35B45 35G05 PDFBibTeX XMLCite \textit{V. I. Ruderfer}, Math. USSR, Sb. 37, 403--410 (1980; Zbl 0444.35079) Full Text: DOI
Ruderfer, V. I. Über die Nullstellen der Lösungen einer linearen analytischen partiellen Differentialgleichung beliebiger Ordnung. (Russian) Zbl 0416.35073 Mat. Sb., N. Ser. 109(151), 432-439 (1979). MSC: 35R25 35A10 35B05 35E20 PDFBibTeX XMLCite \textit{V. I. Ruderfer}, Mat. Sb., Nov. Ser. 109(151), 432--439 (1979; Zbl 0416.35073) Full Text: EuDML