%0 Journal Article %T Manuscript Information Investigations of the Green Function and Discreteness of Spectrum of Higher Order Operator-Differential Equations on Semi-Axis Authors Abstract Keywords Reference %A Gamidulla Aslanov %A Novrasta Abdullayeva %J - %D 2017 %U http://www.aascit.org/journal/archive2?journalId=921&paperId=5312