Comments on some recent papers on the hyperspherical approach in   few-body systems
  Recent papers by Kievsky, Viviani, and Rosati are commented. It is pointed out that the techniques for treatment few-body reactions and bound states in the framework of the hyperspherical approach presented in those papers as original ones were in fact known and have been applied previously. 
V.D. Efros (Russian Research Centre "Kurchatov Institute", Moscow,   Russia)