%0 Journal Article %A Alexander V. Turbiner %T From Quantum $A_N$ (Calogero) to $H_4$ (Rational) Model %J Symmetry, integrability and geometry: methods and applications %D 2011 %V 7 %U http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a70/ %G en %F SIGMA_2011_7_a70