Reply to the paper of V.D. Efros: Comments in some recent papers on the   Hyperspherical approach in few--body system
  Few days ago V.D. Efros submitted a preprint to nucl-th containing criticisms of our recent research activity on bound and scattering states of A=3, 4 nucleons. As a consequence, we are forced to examine the essence of the controversy and of the comments contained in that preprint. These are the motivations of the present paper. 
A.Kievsky (1), L.E. Marcucci (2), S.Rosati (1,3), M.Viviani (1) ((1)   Istituto Nazionale di Fisica Nucleare, Pisa, Italy (2...