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JohnARBUTHNOT.tex. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=JohnARBUTHNOT.tex&oldid=38396
JohnARBUTHNOT.tex. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=JohnARBUTHNOT.tex&oldid=38396