A new proof of a theorem of Balcerzyk, Białynicki-Birula and Łoś John O'Neill — 1996 Colloquium Mathematicae
A theorem on direct products of Slender modules John D. O'Neill — 1987 Rendiconti del Seminario Matematico della Università di Padova
Measurable products of modules John D. O'Neill — 1985 Rendiconti del Seminario Matematico della Università di Padova
On summands of direct products of Abelian groups John D. O'Neill — 1983 Commentationes Mathematicae Universitatis Carolinae
Test elements and the retract theorem in hyperbolic groups. O'Neill, John C.; Turner, Edward C. — 2000 The New York Journal of Mathematics [electronic only]