@book{15438,
	author = {Gopal, M.},
	title = {Digital Control Engineering},
	publisher = {John Wiley & Sons,},
	year = {1988.},
	address = {New York:},
	url = {https://books.google.com.pk/books/about/Digital_Control_Engineering.html?id=ZXfX-nnYiOcC&redir_esc=y}
}