【作者(必填)】

【文题(必填)】Sturm–Liouville Operators, Their Spectral Theory, and Some Applications

【年份(必填)】

【全文链接或数据库名称(选填)】https://www.ams.org/books/coll/067/
还有本gsm等待大佬应助 https://bbs.pinggu.org/forum.php?mod=viewthread&tid=12299749