1. Path integrals and the indefiniteness of the gravitational action
2. Stabilizing bottomless action theories
3. J. Greensite, A fifth-time action approach to the conformal instability problem in euclidean quantum gravity, SFSU-TH-91/1; Stabilized quantum gravity, SFSU-TH-92/1; Vanishing of the cosmological constant in stabilized gravity, NBI-HE-92-41
4. Ultraviolet divergences in quantum gravity;Weinberg,1979
5. State sum invariants of 3-manifolds and quantum 6j symbols;Turaev,1990