@book{2615,
	author = {Nagrath, I. J. and Kothari, D. P.},
	title = {Modern power system analysis /},
	publisher = {McGraw-Hill Higher Education,},
	year = {c1989 [reprinted 2002].},
	series = {McGraw-Hill core concepts in electrical engineering series.},
	address = {New Delhi ;},
	edition = {2nd ed.}
}