@book{20823,
	author = {Das, Sukhendu},
	title = {Computer Graphics:},
	publisher = {Indian Insitiute of Technology},
	address = {Madras},
	url = {http://video.snu.edu.in/index.php?id=1322&cat=Computer Science and  Engineering&course=Computer Graphics&url=Phase1_Video/106106090/lec35.mp4}
}