@article{Wyman2013,
   author  = {Chris Wyman and Peter-Pike Sloan and Peter Shirley},
   title   = {Simple Analytic Approximations to the {CIE XYZ} Color Matching Functions},
   year    = {2013},
   month   = {July},
   day     = {12},
   journal = {Journal of Computer Graphics Techniques (JCGT)},
   volume  = {2},
   number  = {2},
   pages   = {1--11},
   url     = {http://jcgt.org/published/0002/02/01/},
   issn    = {2331-7418}
}