B. C. Roy
- (2022): Track Transition on Bridges or Switch-Over Ramps: Rail Based Urban Transport. Présenté pendant: IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022.
- Use of precast elements in the construction of Delhi flyovers. Présenté pendant: 14th IABSE Congress, New Delhi, India, 6-10 March 1992. (1992):
- (2008): Transport Infrastructure in Indian Urban Environment. Présenté pendant: 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008.
- (2007): Unified planning, design and implementation of infrastructure. Présenté pendant: IABSE Symposium: Improving Infrastructure Worldwide, Weimar, Germany, 19-21 September 2007.