TY - JOUR KW - pfc AU - E. Fotheringham AU - Dana Anderson BT - Applied Optics DA - 2003-01 DO - 10.1364/AO.42.004736 PY - 2003 EP - 4736 T2 - Applied Optics TI - A Miniature Photorefractive Circuit for Principal Component Extraction VL - 42 SN - 0003-6935 ER -