Mod 2 Semi-characteristics and the Converse to a Theorem of Milnor. William Pardon — 1980 Mathematische Zeitschrift
When are Topologically Equivalent Orthogonal Transformations Linearly Equivalent? William Pardon; W.-c. Hsiang — 1982 Inventiones mathematicae
Intersection homology Poincaré spaces and the characteristic variety theorem. William L. Pardon — 1990 Commentarii mathematici Helvetici