@inproceedings{prahl02b,
  author = {S. A. Prahl},
  title = {Simple and Accurate Approximations for Reflectance from a Semi-Infinite Turbid Medium},
  booktitle = {OSA Biomedical Topical Meetings},
  publisher = {Optical Society of America},
  address = {Washington, D.C.},
  year = {2002},
  pages = {613--614},
  abstract = {Rational polynomial approximations are given for the total reflection from a semi-infinite turbid medium for normal collimated irradiance. These approximations have an error of less than 0.01 for any albedo or anisotropy.},
}