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- [3] LIMIT-CIRCLE CRITERION FOR SECOND-ORDER DIFFERENTIAL OPERATORS QUARTERLY JOURNAL OF MATHEMATICS, 1973, 24 (96): : 451 - 455
- [4] LIMIT-CIRCLE CRITERIA FOR 2ND-ORDER DIFFERENTIAL-EXPRESSIONS QUARTERLY JOURNAL OF MATHEMATICS, 1984, 35 (140): : 415 - 427
- [5] REMARKS ON LIMIT-CIRCLE CLASSIFICATION OF SECOND-ORDER DIFFERENTIAL OPERATORS QUARTERLY JOURNAL OF MATHEMATICS, 1973, 24 (95): : 423 - 425
- [6] WEIGHTED SINGULAR DIFFERENTIAL OPERATORS IN LIMIT-CIRCLE CASE JOURNAL OF THE LONDON MATHEMATICAL SOCIETY-SECOND SERIES, 1972, 4 (MAY): : 741 - &
- [9] ON 2ND-ORDER DIFFERENTIAL-EQUATION OF LIMIT-CIRCLE TYPE KEXUE TONGBAO, 1983, 28 (12): : 1595 - 1599
- [10] LIMIT-CIRCLE CLASSIFICATION OF SECOND-ORDER DIFFERENTIAL EXPRESSIONS QUARTERLY JOURNAL OF MATHEMATICS, 1972, 23 (90): : 193 - &