TY  - RPRT
TI  - PPS-87: a new event oriented solar proton prediction model.
AU  - D F Smart
AU  - M A Shea
PY  - 1989
DO  - 10.1016/0273-1177(89)90450-x
UR  - https://pubmed.ncbi.nlm.nih.gov/11537304/
ID  - 11537304
ER  -