TY  - RPRT
TI  - String dynamics in cosmological and black hole backgrounds: The null string expansion.
AU  - CO Lousto
AU  - N Sánchez
PY  - 1996
DO  - 10.1103/physrevd.54.6399
UR  - https://pubmed.ncbi.nlm.nih.gov/10020641/
ID  - 10020641
ER  -