@misc{55531,
  author = {Sita Ramamurti and David Gilsinn},
  title = {Bicubic B-Spline Surface Approximation of Invariant Tori},
  year = {2010},
  month = {2010-10-20},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906906},
  language = {en},
}