A characterization of differentiable submanifolds of Euclidean spaces B. Hajduk — 1973 Colloquium Mathematicae
Comparing handle decompositions of homotopy equivalent manifolds B. Hajduk — 1977 Fundamenta Mathematicae
Homotopy type of automorphism groups of manifolds W. Balcerak; B. Hajduk — 1981 Colloquium Mathematicae