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- [1] HYPOELLIPTICITY FOR INFINITELY DEGENERATE ELLIPTIC AND PARABOLIC OPERATORS OF 2ND ORDER JOURNAL OF MATHEMATICS OF KYOTO UNIVERSITY, 1988, 28 (04): : 615 - 632
- [4] HYPOELLIPTICITY FOR SOME INFINITELY DEGENERATE ELLIPTIC-OPERATORS OF 2ND-ORDER JOURNAL OF MATHEMATICS OF KYOTO UNIVERSITY, 1992, 32 (02): : 373 - 386
- [5] ESTIMATES FOR DEGENERATE SCHRODINGER-OPERATORS AND HYPOELLIPTICITY FOR INFINITELY DEGENERATE ELLIPTIC-OPERATORS JOURNAL OF MATHEMATICS OF KYOTO UNIVERSITY, 1992, 32 (02): : 333 - 372
- [8] The positivity of Schrodinger operators and the hypoellipticity of second order degenerate elliptic operators BULLETIN DES SCIENCES MATHEMATIQUES, 1997, 121 (07): : 507 - 547
- [10] PARTIAL HYPOELLIPTICITY FOR ELLIPTIC DEGENERATE OPERATORS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1977, 284 (15): : 885 - 888