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WikiPedia: Sophomore's dream http://mathworld.wolfram.com/SophomoresDream.html //doi.org/10.1216%2FRMJ-1985-15-2-461 //doi.org/10.1216%2Frmjm%2F1181072076 http://eretrandre.org/rb/files/JayFantini1998_203.... http://math.eretrandre.org/tetrationforum/attachme... http://math.eretrandre.org/tetrationforum/showthre... http://max.pm/publications/soph-1m.txt https://books.google.com/books?id=b9l2NqGEFzgC&pg=...