Ramer, Urs, An iterative procedure for the polygonal approximation of plane curves, Computer Graphics and Image Processing, 1972, 1 (3): 244–256, doi:10.1016/S0146-664X(72)80017-0.
Douglas, David; Peucker, Thomas, Algorithms for the reduction of the number of points required to represent a digitized line or its caricature, The Canadian Cartographer, 1973, 10 (2): 112–122, doi:10.3138/FM57-6770-U75U-7727.
Tamassia, Roberto, On embedding a graph in the grid with the minimum number of bends, SIAM Journal on Computing, 1987, 16 (3): 421–444, doi:10.1137/0216030.
