M. F. Barnsley, A. Sloan. Methods and apparatus for image compression by iterated function system. United States Patent 4,941,193, 0.
@Misc{BaSl90,
Author = {Barnsley, M. F. and Sloan, A.},
Title = {Methods and apparatus for image compression by iterated function system},
Howpublished = {United States Patent 4,941,193},
Year = {0}
}