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- [2] EUCLIDEAN STRUCTURES COMPATIBLE WITH ALMOST TANGENT STRUCTURES BULLETIN DE LA CLASSE DES SCIENCES ACADEMIE ROYALE DE BELGIQUE, 1964, 50 (10): : 1174 - +
- [4] ALMOST PRODUCT STRUCTURES ON TANGENT BUNDLE INDIAN JOURNAL OF PURE & APPLIED MATHEMATICS, 1981, 12 (01): : 61 - 70
- [5] RIEMANNIAN STRUCTURES SUBORDINATE TO CERTAIN ALMOST TANGENT STRUCTURES CANADIAN MATHEMATICAL BULLETIN, 1972, 15 (01): : 71 - &
- [8] HOMOGENEOUS R-TANGENT STRUCTURES BULLETIN DE LA CLASSE DES SCIENCES ACADEMIE ROYALE DE BELGIQUE, 1972, 58 (04): : 476 - +
- [9] HOMOGENEOUS R-TANGENT STRUCTURES BULLETIN DE LA CLASSE DES SCIENCES ACADEMIE ROYALE DE BELGIQUE, 1972, 58 (05): : 476 - 480