@book{20382,
	author = {Kalra, Prem K},
	title = {Introduction to Computer Graphics:},
	publisher = {Indian Insitiute of Technology},
	address = {Delhi},
	url = {http://video.snu.edu.in/index.php?id=959&cat=Computer Science and  Engineering&course=Introduction to Computer Graphics&url=Phase1_Video/106102065/lec27.mp4}
}