Citation: Vg. Bagrov et Vv. Obukhov, SEPARATION OF VARIABLES FOR THE DIRAC SQUARE EQUATION, International journal of modern physics D, 3(4), 1994, pp. 739-746
Citation: Vg. Bagrov et Vv. Obukhov, COMPLETE SEPARATION OF VARIABLES IN THE FREE HAMILTON-JACOBI EQUATION, Theoretical and mathematical physics, 97(2), 1993, pp. 1275-1289