@entry{hei-04-aa,
  author = {W Heidrich},
  title = {Real-time Shading: Sampling Procedural Shaders},
  journal = {},
  volume = {},
  number = {},
  pages = {},
  year = 2004,
  month = ,
  doi = {},
  comment = {},
  abstract = {},
  url = {{\url{https://redirect.cs.umbc.edu/~olano/s2004c01/ch09.pdf}}},
  quotes = {... In our description we uses affine arithmetic to obtain ... interval arithmetic to affine arithmetic for the specific application ... than the bounds produced by affine arithmetic. Figure 2 shows the ...}
}