TY  - RPRT
TI  - Optical scalars and singularity avoidance in spherical spacetimes.
AU  - E Malec
AU  - Ó Murchadha N
PY  - 1994
DO  - 10.1103/physrevd.50.r6033
UR  - https://pubmed.ncbi.nlm.nih.gov/10017641/
ID  - 10017641
ER  -