@techreport{bvp6ctechnical,
  title = "A Sixth-Order Extension to the MATLAB Package bvp4c of J. Kierzenka and L. Shampine",
  author = "Nicholas Hale and Daniel R. Moore",
  year = "2008",
  institution = "Oxford University Computing Laboratory",
  month = "May",
  number = "NA-08/04",
  url = "http://www.comlab.ox.ac.uk/nick.hale/bvp6c/bvp6c_technical_report.pdf",
}