TY - RPRT TI - Nonperturbative lorentzian path integral for gravity AU - J Ambjorn AU - J Jurkiewicz AU - R Loll PY - 2000 DO - 10.1103/physrevlett.85.924 UR - https://pubmed.ncbi.nlm.nih.gov/10991440/ ID - 10991440 ER -