Revision history for entry Platvono, Jan: Gentzen's proof of normalization for natural deduction [PLAGPO]

NB: for privacy reasons, few details are provided in public revision histories.
TimeTypeNotes
2015-02-05T03:15:06updateSystem / admin update
2010-10-28T12:15:50updateSystem / admin update
2010-09-30T18:25:52addSystem / admin update