IIT Madras,Chennai,India, July 2007
CalcuttaUniversity,Kolkata,India, October 2004
CalcuttaUniversity,Kolkata,India, September 2002
Calcutta University, Kolkata, India, July 1999
IIT Madras,Chennai,India, July 2007
CalcuttaUniversity,Kolkata,India, October 2004
CalcuttaUniversity,Kolkata,India, September 2002
Calcutta University, Kolkata, India, July 1999