@article{EXMA_1998__7_4_225379,
     author = {Lanford III, Oscar E.},
     title = {Informal remarks on the orbit structure of discrete approximations to chaotic maps.},
     journal = {Experimental mathematics},
     pages = {317--324},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1998},
     zbl = {0922.58042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_1998__7_4_225379/}
}