Invariance proof of simplicial homology and cohomology groups without using subdivisions or axiomatic approach Hu, Sze-Tsen — 1970 Portugaliae mathematica
On the Whitehead group of automorphisms of the relative homotopy groups Hu, Sze-Tsen — 1948 Portugaliae mathematica
Homotopy properties of the space of continuous paths. II - The general case with arbitrary boundary sets Hu, Sze-Tsen — 1952 Portugaliae mathematica
An axiomatic approach to homotopy theory without using the relative groups Hu, Sze-Tsen — 1961 Portugaliae mathematica
On axiomatic approach to homology theory without using the relative groups Hu, Sze-Tsen — 1960 Portugaliae mathematica