00457nam a2200145Ia 4500 20251229190630.0 251229s9999 xx 000 0 und d 0792303814 QA 379 .G67 Gobachuk, V. I Boundary value problems for operator differential equations/by V.I.Gorbachuk, & M.L.Gorbarchuk V Gobachuk London Kluwer Academic 1990 Strum-Liouville Equations BK 539173 539173 0 0 0 0 EGERTONLIB EGERTONLIB GEN 2025-12-29 0 QA 379 G67 EU080915 2025-12-29 19:06:30 2025-12-29 BK