Louko, Jorma Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
9805101v2.pdf (プレプリント), 352KB
Phy.Rev.D.58.084008.pdf (出版社版), 305KB
Daughton, A., Louko, J., & Sorkin, R. D. (1998). Instantous and unitarity in quantum cosmology with fixed four-volume. Physical Review D, 58(8):. doi:10.1103/PhysRevD.58.084008.