citHeader("2004 for additive model method and basics of gamm; 2008 for
generalized additive model method; 2006 for overview; 2003 for thin plate
regression splines; 2000 is the original method, but no longer the default.")


citEntry(
 entry="Article",
 title= "Stable and efficient multiple smoothing parameter estimation for 
         generalized additive models",
 journal="Journal of the American Statistical Association",
 volume= "99",
 number="467",
 pages="673-686",
 year="2004",
 author="S. N. Wood",
 textVersion="Wood, S.N. (2004) Stable and efficient multiple smoothing 
 parameter estimation for generalized additive models.Journal of the 
 American Statistical Association. 99:673-686."
)

citEntry(
 entry="Article",
 title="Fast stable direct fitting and smoothness selection for generalized
 additive models",
 journal="Journal of the Royal Statistical Society (B)",
 volume= "70",
 number="3",
 pages="495-518",
 year="2008",
 author="S. N. Wood",
 textVersion="Wood, S.N. (2008) Fast stable direct fitting and smoothness 
 selection for generalized additive models. Journal of the Royal 
 Statistical Society (B) 70(3):495-518 " )


citEntry(
entry="Book",
title="Generalized Additive Models: An Introduction with R",
year="2006",
author="S.N Wood",
publisher="Chapman and Hall/CRC",
textVersion="Wood, S.N. (2006) Generalized Additive Models: An 
Introduction with R. Chapman and Hall/CRC. "
)

citEntry(
 entry="Article",
 title="Thin-plate regression splines",
 journal="Journal of the Royal Statistical Society (B)",
 volume= "65",
 number="1",
 pages="95-114",
 year="2003",
 author="S. N. Wood",
 textVersion="Wood, S.N. (2003) Thin-plate regression splines.
Journal of the Royal Statistical Society (B) 65(1):95-114." )


citEntry(
 entry="Article",
 title="Modelling and smoothing parameter estimation with 
        multiple quadratic penalties",
 journal="Journal of the Royal Statistical Society (B)",
 volume= "62",
 number="2",
 pages="413-428",
 year="2000",
 author="S. N. Wood",
 textVersion="Wood, S.N. (2000) Modelling and smoothing parameter 
estimation with multiple quadratic penalties. Journal of the Royal 
Statistical Society (B) 62(2):413-428. " )