In a method to improve the calibration of a non-invasive, near infrared (NIR) measurement device, a plurality of data terms is formed for the NIR measurement device. Then the codependence of the data terms is evaluated by forming cross-products terms using the data terms. Next, sets of prespecified sizes...http://www.google.se/patents/US6477392?utm_source=gb-gplus-sharePatent US6477392 - Calibration of near infrared quantitative measurement device using optical measurement cross-products
