TY - RPRT TI - The 'ecological' probability density function for linear optic flow: implications for neurophysiology. AU - J Ivins AU - J Porrill AU - J Frisby AU - G Orban PY - 1999 DO - 10.1068/p2807 UR - https://pubmed.ncbi.nlm.nih.gov/10627850/ ID - 10627850 ER -