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- [2] ON EMBEDDINGS OF 1-DIMENSIONAL COMPACTA IN A HYPERPLANE IN E4 NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1970, 17 (02): : 462 - &
- [6] SPHERICAL PRESENTATION OF E4 SURFACES IN E3 AND ASSOCIATED E4 PUNCTUAL TRANSFORMATIONS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1970, 271 (17): : 839 - +