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- [3] A DIFFERENTIAL CALCULUS FOR MULTIFUNCTIONS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1969, 16 (04): : 680 - &
- [9] DIFFERENTIAL CALCULUS FOR MULTIFUNCTIONS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1977, 284 (03): : 141 - 144