Unless otherwise noted, This software is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy at http://www.usgs.gov/visual-id/credit_usgs.html#copyright
Some routines are from or based on (noted as such in the source code):
- C.L.LAWSON AND R.J.HANSON, SOLVING LEAST SQUARES PROBLEMS, PRENTICE-HALL, 1974.
- REINSCH,C.H. AND GOLUB,G.H. 'SINGULAR VALUE DECOMPOSITION AND LEAST SQUARES SOLUTIONS' (NUMER. MATH.) VOL. 14, 1970.