2011 for generalized additive model method; 2016 for beyond exponential
family; 2004 for strictly additive GCV based model method and basics of
gamm; 2017 for overview; 2003 for thin plate regression splines.

  Wood, S.N. (2011) Fast stable restricted maximum likelihood and
  marginal likelihood estimation of semiparametric generalized linear
  models. Journal of the Royal Statistical Society (B) 73(1):3-36

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Fast stable restricted maximum likelihood and marginal 
likelihood estimation of semiparametric generalized linear models},
    journal = {Journal of the Royal Statistical Society (B)},
    volume = {73},
    number = {1},
    pages = {3-36},
    year = {2011},
    author = {S. N. Wood},
  }

  Wood S.N., N. Pya and B. Saefken (2016) Smoothing parameter and model
  selection for general smooth models (with discussion). Journal of the
  American Statistical Association 111:1548-1575.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Smoothing parameter and model selection for general smooth models (with discussion)},
    author = {S.N. Wood and {N.} and {Pya} and B. S{"a}fken},
    journal = {Journal of the American Statistical Association},
    year = {2016},
    pages = {1548-1575},
    volume = {111},
  }

  Wood, S.N. (2004) Stable and efficient multiple smoothing parameter
  estimation for generalized additive models. Journal of the American
  Statistical Association. 99:673-686.

A BibTeX entry for LaTeX users is

  @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},
  }

  Wood, S.N. (2017) Generalized Additive Models: An Introduction with R
  (2nd edition). Chapman and Hall/CRC.

A BibTeX entry for LaTeX users is

  @Book{,
    title = {Generalized Additive Models: An Introduction with R},
    year = {2017},
    author = {S.N Wood},
    edition = {2},
    publisher = {Chapman and Hall/CRC},
  }

  Wood, S.N. (2003) Thin-plate regression splines. Journal of the Royal
  Statistical Society (B) 65(1):95-114.

A BibTeX entry for LaTeX users is

  @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},
  }