INSTABILITY INTERVALS OF HILLS EQUATION

[1] Erdelyi A, 1934, ANN PHYS-BERLIN, V19, P585

[2] HALE JK, 1960, ANN MATH STUD, V5, P55

[3] ASYMPTOTIC ESTIMATES FOR STURM-LIOUVILLE SPECTRUM [J]. COMMUNICATIONS ON PURE AND APPLIED MATHEMATICS, 1961, 14 (04) : 749 - &

[4] Hochstadt H., 1961, SPECIAL FUNCTIONS MA

[5] MAGNUS W, 1957, BR32 DIV EL RES REP

[1] Erdelyi A, 1934, ANN PHYS-BERLIN, V19, P585

[2] HALE JK, 1960, ANN MATH STUD, V5, P55

[3] ASYMPTOTIC ESTIMATES FOR STURM-LIOUVILLE SPECTRUM [J]. COMMUNICATIONS ON PURE AND APPLIED MATHEMATICS, 1961, 14 (04) : 749 - &

[4] Hochstadt H., 1961, SPECIAL FUNCTIONS MA

[5] MAGNUS W, 1957, BR32 DIV EL RES REP