TY  - RPRT
TI  - Structural constraints on RNA virus evolution.
AU  - P Simmonds
AU  - D B Smith
PY  - 1999
DO  - 10.1128/jvi.73.7.5787-5794.1999
UR  - https://pubmed.ncbi.nlm.nih.gov/10364330/
ID  - 10364330
ER  -