1. Fibrewise Homotopy Theory;Crabb,1998
2. Partitions of unity in the theory of fibrations;Dold;Ann. of Math. (2),1963
3. The piecing comparison theorem;Eggar;Indag. Math.,1973
4. Coherent homotopy over a fixed space;Hardie,1995
5. Homotopy Theory and Duality;Hilton,1965