“…However, it has been shown that analytic solutions exist for some polynomial potentials of the order 2N = 4k + 2, where k = 1, 2 .... (see, e.g., Magyari, 1981;Turbiner and Ushveridze, 1987;Ushveridze, 1994;Vanden Berghe et al, 1995;Skala et al, 1996). These solutions have the form…”