@Article{Renka:2008:ATT,
  author =       "Robert J. Renka",
  title =        "Algorithm 893: {TSPACK}: Tension Spline Package for Curve Design and Data Fitting",
  journal =      "{ACM} Transactions on Mathematical Software",
  volume =       "36",
  number =       "1",
  month  =       mar,
  year   =       2009,
  pages  =       "7:1--7:8",
  URL =          "http://doi.acm.org/10.1145/1486525.1486532",
  accepted =     "29 August 2008",
  abstract =     "
		 {\tt TSPACK} is a curve fitting package
		 based on exponential tension splines with
		 automatic selection of tension factors.
		 It serves both as a method for data
		 fitting with preservation of shape
		 properties or more general constraints,
		 and as a means of computer aided
		 geometric design of curves in two or
		 three dimensions.  The package is based
		 on a translation of Algorithm 716 from
		 Fortran 77 into MATLAB.  The translation
		 includes bug corrections, vectorization
		 where possible, and extensions, including
		 a B-spline representation, designed to
		 facilitate curve design as opposed to
		 data fitting.	An interactive graphical
		 user interface, not part of the algorithm,
		 is available from the author.",
}