TY - RPRT TI - A two-layer sparse coding model learns simple and complex cell receptive fields and topography from natural images. AU - A Hyvärinen AU - P O Hoyer PY - 2001 DO - 10.1016/s0042-6989(01)00114-6 UR - https://pubmed.ncbi.nlm.nih.gov/11459597/ ID - 11459597 ER -