What is the relationship between synaesthesia and visuo-spatial number forms?

Cite this paper

@article{Sagiv2006WhatIT, title={What is the relationship between synaesthesia and visuo-spatial number forms?}, author={Noam Sagiv and Julia Simner and James Collins and Brian Butterworth and Jamie Ward}, journal={Cognition}, year={2006}, volume={101 1}, pages={114-28} }