Logiweb bibliography of peano commutativity

Logiweb bibliography of peano commutativity in pyk

[0] peano commutativity
[1] base
[2] peano
[3] check

The pyk compiler, version 0.grue.20050603 by Klaus Grue,
GRD-2005-07-03.UTC:14:50:38.354331 = MJD-53554.TAI:14:51:10.354331 = LGT-4627119070354331e-6