共 50 条
- [1] 2ND-ORDER OPERATORS WITH NONZERO ETA INVARIANT [J]. CANADIAN MATHEMATICAL BULLETIN-BULLETIN CANADIEN DE MATHEMATIQUES, 1992, 35 (03): : 341 - 353
- [3] 2ND-ORDER PERTURBATION ON A SDCI CALCULATION [J]. CHEMICAL PHYSICS LETTERS, 1993, 211 (06) : 625 - 630
- [6] 2ND-ORDER PERTURBATION IN A VIBRONIC SYSTEM [J]. PHYSICAL REVIEW B, 1977, 16 (10): : 4684 - 4694
- [9] AN INEQUALITY FOR 2ND-ORDER ELLIPTICAL OPERATORS [J]. ANNALI DI MATEMATICA PURA ED APPLICATA, 1981, 127 : 1 - 11
- [10] PERTURBATION ALGEBRA OF INVARIANT DIFFERENTIAL-OPERATORS [J]. NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-GENERAL PHYSICS RELATIVITY ASTRONOMY AND MATHEMATICAL PHYSICS AND METHODS, 1986, 91 (01): : 115 - 125