@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} } @article {1980826, title = {Visualizing the intellectual structure with paper-reference matrices}, year = {2009}, month = {2009}, address = {Atlantic City, NJ, USA}, keywords = {BIS}, author = {Zhang,Jian and Chen,Chaomei and Li,Jiexun} }