@entry{flo-sbe-sai-veh-06-aa,
  author = {J Fl{\'o}rez and M Sbert and MA Sainz and J Veh{\'\i}},
  title = {Improving the interval ray tracing of implicit surfaces},
  journal = {Computer Graphics International ...,},
  volume = {},
  number = {},
  pages = {},
  year = 2006,
  month = ,
  doi = {},
  comment = {},
  abstract = {},
  url = {{\url{https://link.springer.com/chapter/10.1007/11784203_63}}},
  quotes = {... De Cusatis [8] suggest the use of affine arithmetic instead of interval arithmetic to solve the intersection test. The algorithms previously mentioned consider only one interval variable (the ...}
}