India's First Nuclear Submarine INS Arihant goes Critical

INS Arihant reactor goes critical, submarine to start sea trials 
- India Today, August 10, 2013.

India moves toward N-triad as INS Arihant's reactor activated 
- MSN News, August 10, 2013.

INS Arihant - A Strategic Perspective
The Hindu, August 13, 2013.