Logiweb bibliography of peano commutativity

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[0] peano commutativity

[1] base

[2] peano

[3] check

The pyk compiler, version 0.grue.20050603 by Klaus Grue GRD-2005-07-03.UTC:17:02:22.108370 = MJD-53554.TAI:17:02:54.108370 = LGT-4627126974108370e-6