Singh, A., and S. Aasma. “Grid Failure in Northern, Eastern and North-Eastern Grid in 2012: Cause and Its Effect on Economy of India An Review”. SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology, Vol. 3, no. 02, Dec. 2012, pp. 67-72, doi:10.18090/samriddhi.v3i2.1615.