TY  - RPRT
TI  - Nonderivative modified gravity: a classification
AU  - Comelli, D.
AU  - Nesti, F.
PY  - 2014
DO  - 10.1088/1475-7516/2014/11/018
UR  - https://www.osti.gov/biblio/22375754
ID  - 22375754
ER  -