DESCRIPTION OF THE N-ORTHOGONAL CURVILINEAR COORDINATE SYSTEMS AND HAMILTONIAN INTEGRABLE SYSTEMS OF HYDRODYNAMIC TYPE, I - INTEGRATION OF THE LAME EQUATIONS
Ve. Zakharov, DESCRIPTION OF THE N-ORTHOGONAL CURVILINEAR COORDINATE SYSTEMS AND HAMILTONIAN INTEGRABLE SYSTEMS OF HYDRODYNAMIC TYPE, I - INTEGRATION OF THE LAME EQUATIONS, Duke mathematical journal, 94(1), 1998, pp. 103-139