1. The stable suspension of an Eilenberg–MacLane space;Barcus;Trans. Amer. Math. Soc.,1960
2. Category and generalized Hopf invariants;Berstein;Illinois J. Math.,1960
3. On the homotopy-commutativity of loop-spaces and suspensions;Ganea;Topology,1962
4. Homotopy Theory and Duality;Hilton,1959
5. Excision and principal fibrations;Hilton;Comment. Math. Helvet.,1961