On the filling radius of positively curved manifolds. Inventiones Mathematicae,

107  (1992) 653--668. 





On Frankel's theorem, with P. Petersen Bulletin of the Canadian Mathematical Society, 46 (2003) 130-139.












Crosscap Stability,  with C. Pro  and M. Sill,  Advances in Geometry,  2017; 17 (2):231–245.


 Almost nonnegative curvature on some fake RP^6s and RP^14s with P. RajanBulletin of the Australian Mathematical Society,  94 (2016), 304-315.