TY  - RPRT
TI  - How low can toll go?
AU  - T Rich
AU  - R Allen
AU  - J Trowsdale
PY  - 2000
DO  - 10.1016/s0168-9525(00)02026-6
UR  - https://pubmed.ncbi.nlm.nih.gov/10858658/
ID  - 10858658
ER  -