Obstruction Theory in Fiber Spaces.
Obstructions to the section problem in a fibration with a weak formal base.
On Fibrations and nilpotency - some remarks upon two articles by I. M. James.
On homotopically regular mappings of manifolds
On H-spaces over a base space.
On the fiber-preserving maps
On the geometric bar construction and the Brown representability theorem
On the Homotopy Properties of Thom Complexes.
On the maps of one fibre space into another
On two results about fibrations.
Open subsets of fibrations
Orbit projections as fibrations
The orbit projection of a proper -manifold is a fibration if and only if all points in are regular. Under additional assumptions we show that is a quasifibration if and only if all points are regular. We get a full answer in the equivariant category: is a -quasifibration if and only if all points are regular.
Orbit projections of proper Lie groupoids as fibrations
Let be a source locally trivial proper Lie groupoid such that each orbit is of finite type. The orbit projection is a fibration if and only if is regular.