## An extension theorem for transformation groupoids.(English)Zbl 0357.20037

Proc. R. IR. Acad., Sect. A 75, 255-262 (1975).

### MSC:

 20L05 Groupoids (i.e. small categories in which all morphisms are isomorphisms) 57S99 Topological transformation groups 55R10 Fiber bundles in algebraic topology