- Notes for the lectures given in the Allahabad Low Dimensional Topology Instructional Conference are here .
- Notes for the lecture given in the Chennai Topological Methods in Group Theory Workshop is here .
- Slides of the lecture given in the Satellite Conference of the ICM2002 on Geometric Topology, Xi'an, China are here .
- Slides of the lecture (short communication) given in the ICM2002, Beijing, China are here .
- Slides of the lecture given in the joint India-AMS Mathematics meeting for the special session on Algebraic and Geometric Topology, Bangalore, India are here .
- Notes for the lectures
given in the
Bangalore advanced instructional workshop on low-dimensional
topology and geometric group theory are
here .

- Notes for the lectures given in the Shillong advanced instructional school in Algebraic Topology are here .
- Slides of the lecture
given in the Kunming, China conference on Group actions and
applications in Geometry, Topology and Analysis are here.

- Slides of the lecture given in the
Delhi, India 27th Annual Conference of the Ramanujan Mathematical Society are here.

- Notes of the lectures given in the
Shillong International Advance Training in Mathematics (ATM) workshop/conference on
surgery theory and classification of manifolds are here.