TY  - RPRT
TI  - Ladders revisited.
AU  - Biswadev Mitra
AU  - Peter A Cameron
AU  - Belinda J Gabbe
PY  - 2007
DO  - 10.5694/j.1326-5377.2007.tb00785.x
UR  - https://pubmed.ncbi.nlm.nih.gov/17229031/
ID  - 17229031
ER  -