TY - RPRT TI - Tracking Excited States in Wave Function Optimization Using Density Matrices and Variational Principles AU - Tran, Lan Nguyen AU - Shea, Jacqueline A. R. AU - Neuscamman, Eric PY - 2019 DO - 10.1021/acs.jctc.9b00351 UR - https://www.osti.gov/biblio/1572049 ID - 1572049 ER -