TY  - RPRT
TI  - The world isn't flat.
AU  - Steven Itzkowitz
AU  - Thomas Ullman
PY  - 2004
DO  - 10.1016/s0016-5107(04)01812-7
UR  - https://pubmed.ncbi.nlm.nih.gov/15332035/
ID  - 15332035
ER  -