@book{de1978practical,
  title =        {A Practical Guide to Splines},
  author =       {De Boor, Carl},
  volume =       27,
  year =         1978,
  publisher =    Springer-Verlag,
  Address =      {New York},
  doi =          {10.1002/zamm.19800600129}
}

@article{meyer2008inference,
  title =        {Inference Using Shape-Restricted Regression Splines},
  author =       {Meyer, Mary C},
  journal =      {The Annals of Applied Statistics},
  pages =        {1013--1033},
  year =         2008,
  publisher =    {JSTOR},
  doi =          {10.1214/08-AOAS167}
}

@article{ramsay1988monotone,
  title =        {Monotone Regression Splines in Action},
  author =       {Ramsay, J O},
  journal =      {Statistical Science},
  pages =        {425--441},
  year =         1988,
  publisher =    {JSTOR},
  doi =          {10.1214/ss/1177012761}
}
