共 50 条
- [1] RETRACTING DIFFEOMORPHISMS OF N-SPHERES NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1969, 16 (05): : 768 - &
- [5] SHAPE OF FINITE BOUQUETS OF N-SPHERES BULLETIN DE L ACADEMIE POLONAISE DES SCIENCES-SERIE DES SCIENCES MATHEMATIQUES ASTRONOMIQUES ET PHYSIQUES, 1974, 22 (12): : 1251 - 1254