@article {1972871,
	title = {Visualizing the Intellectual Structure with Paper-Reference Matrices},
	journal = {IEEE Transactions on Visualization and Computer Graphics},
	volume = {15},
	year = {2009},
	month = {2009},
	pages = {1153-1160},
	keywords = {BIS},
	author = {Zhang,Jian and Chen,Chaomei and Li,Jiexun}
}