Scheinerman, Edward R. (2000), "When close enough is close enough", American Mathematical Monthly, 107 (6): 489–499, doi:10.2307/2589344, JSTOR2589344, MR1766736
doi.org
Scheinerman, Edward R. (2000), "When close enough is close enough", American Mathematical Monthly, 107 (6): 489–499, doi:10.2307/2589344, JSTOR2589344, MR1766736
Scheinerman, Edward R. (2000), "When close enough is close enough", American Mathematical Monthly, 107 (6): 489–499, doi:10.2307/2589344, JSTOR2589344, MR1766736