![Notation Systems for Infinitary Derivationsby Wilfried Buchholz;Explaining Gentzen's Consistency Proof within Infinitary Proof Theoryby Wilfried Buchholz;Finitary Reductions for Local Predicativity, I: Recursively Regular Ordinalsby Sergei Tupailo]()
Notation Systems for Infinitary Derivationsby Wilfried Buchholz;Explaining Gentzen's Consistency Proof within Infinitary Proof Theoryby Wilfried Buchholz;Finitary Reductions for Local Predicativity, I: Recursively Regular Ordinalsby Sergei TupailoReview by: Toshiyasu Arai, Toshiyasu Arai and Toshiyasu Arai · The Bulletin of Symbolic Logic · 2002