The Definability of the set of natural numbers in the 1925 Principia Mathematica. - Gregory Landini (J. Philos. Log., 1996)

Logic in Russell's Principles of Mathematics. - Gregory Landini (Notre Dame J. Formal Log., 1996)

Truth, Predication and a Family of Contingent Paradoxes. - Francesco Orilia; Gregory Landini (J. Philos. Log., 2019)

Tractarian Logicism: Operations, numbers, Induction. - Gregory Landini (Rev. Symb. Log., 2021)