Brett W. Bader Richard A. Harshman Tamara G. Kolda Temporal Analysis of Semantic Graphs Using ASALSAN. 33-42 2007 ICDM http://doi.ieeecomputersociety.org/10.1109/ICDM.2007.54 conf/icdm/2007 db/conf/icdm/icdm2007.html#BaderHK07