TY  - RPRT
TI  - On constraining pilot point calibration with regularization in PEST
AU  - M.N. Fienen
AU  - C.T. Muffels
AU  - R. J. Hunt
PY  - 2009
DO  - 10.1111/j.1745-6584.2009.00579.x
UR  - https://pubs.usgs.gov/publication/70037280
ID  - 70037280
ER  -