TY  - RPRT
TI  - Thinking combinatorially.
AU  - S Kauffman
AU  - A D Ellington
PY  - 1999
DO  - 10.1016/s1367-5931(99)80040-4
UR  - https://pubmed.ncbi.nlm.nih.gov/10359721/
ID  - 10359721
ER  -