Bounds on Schrodinger eigenvalues for polynomial potentials in N dimensions

Saad, Nasser, and R. L. Hall. “Bounds on Schrodinger Eigenvalues for Polynomial Potentials in N Dimensions”. Journal of Mathematical Physics, vol. 38, no. 10, 1997, pp. 4909-13, https://doi.org/https://doi.org/10.1063/1.531925.