Cohomogeneity and positive curvature in low dimensions. Catherine Searle — 1993 Mathematische Zeitschrift
Some examples of spherical orbit spaces with cohomogeneity 2. McGowan, Jill; Searle, Catherine — 2001 Divulgaciones Matemáticas
An introduction to spherical orbit spaces. McGowan, Jill; Searle, Catherine — 2002 International Journal of Mathematics and Mathematical Sciences