共 50 条
- [1] DISCONJUGACY CRITERIA FOR SELFADJOINT DIFFERENTIAL SYSTEMS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1969, 16 (01): : 92 - &
- [2] DISCONJUGACY CRITERIA FOR SYSTEMS OF SELF-ADJOINT DIFFERENTIAL EQUATIONS JOURNAL OF THE LONDON MATHEMATICAL SOCIETY-SECOND SERIES, 1973, 6 (FEB): : 373 - 381
- [6] DISCONJUGACY CRITERIA FOR NONSELFADJOINT DIFFERENTIAL EQUATIONS OF EVEN ORDER CANADIAN JOURNAL OF MATHEMATICS, 1971, 23 (04): : 644 - &
- [9] DISCONJUGACY CRITERIA FOR NONSELFADJOINT DIFFERENTIAL EQUATIONS OF EVEN ORDER NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1970, 17 (05): : 776 - &