DP - MPI Library TY - JOUR AU - Montgomery, D. AU - Yang, C. T. T1 - Differentiable Actions on Homotopy Seven Spheres UR - https://www.jstor.org/stable/1994562 UR - http://dx.doi.org/10.2307/1994562 T2 - Transactions of the American Mathematical Society SP - Vol. 122, No. 2 (1966), p. 480-498 CY - Providence PY - 1966 N1 - Copyright: Copyright 1966 American Mathematical Society ER -