Hamber, Herbert W. AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
1212.3492 (Preprint), 14MB
PhysRevD.88.084012.pdf (Any fulltext), 2MB
Hamber, H. W., Toriumi, R., & Williams, R. M. (2013). Wheeler-DeWitt Equation in 3 + 1 Dimensions. Physical Review D, 88(8): 084012. doi:10.1103/PhysRevD.88.084012.