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- [1] ASYMPTOTIC SOLUTIONS OF ORDINARY LINEAR DIFFERENTIAL EQUATIONS OF THE 2ND ORDER PHYSICAL REVIEW, 1950, 80 (06): : 1112 - 1113
- [2] ASYMPTOTIC REPRESENTATION OF SOLUTIONS OF 2ND ORDER LINEAR DIFFERENTIAL EQUATIONS DOKLADY AKADEMII NAUK SSSR, 1958, 118 (01): : 25 - 28
- [9] ON THE ZEROS OF THE REAL AND IMAGINARY PART OF THE SOLUTIONS OF 2ND ORDER LINEAR-DIFFERENTIAL EQUATIONS MONATSHEFTE FUR MATHEMATIK, 1981, 92 (04): : 291 - 297