Awasthi, Veerendra Vikram, Harish-Chandra Research Institute (HRI), Chhatnag Road, Jhunsi, Allahabad-211 019, India

• The Journal of the Indian Mathematical Society Volume 72, Issue 1-4, January-December 2005 - Articles
  Strongly Contractible Polyhedra which are Not Simply Contractible at n Points For any n≥ 2
  Abstract