TY - RPRT TI - Internal eigenstate problem: the trial state method. AU - G Jolicard AU - J P Killingbeck AU - M Y Perrin PY - 2001 DO - 10.1103/physreve.63.026701 UR - https://pubmed.ncbi.nlm.nih.gov/11308606/ ID - 11308606 ER -