TY  - RPRT
TI  - Evolution was chemically constrained.
AU  - R J P Williams
AU  - J J R Fraústo Da Silva
PY  - 2003
DO  - 10.1006/jtbi.2003.3152
UR  - https://pubmed.ncbi.nlm.nih.gov/12468283/
ID  - 12468283
ER  -