@第{zbMATH04052046条，作者={Rofe-Beketov，F.S.和Khol'kin，A.M.}，标题={任意阶微分算子方程谱性质和振动性质的联系。{I}:{A}{Sturm}型}定理，FJournal={Teoriya Funktsi{\u{\i}}，Funktsional'ny{\u}}Analiz i ikh Prilozheniya}，日志={Teor.Funkts.Funkts。Anal.Prilozh.}，ISSN={0321-4427}，体积={48}，Pages＝{101-111}，年份={1987}，语言={俄语}，关键词={34C05,47E05}，zbMATH={4052046}，Zbl={0645.34024}}