TY - RPRT TI - Optimization methods and their use in low-energy electron-diffraction calculations. AU - H Over AU - U Ketterl AU - W Moritz AU - G Ertl PY - 1992 DO - 10.1103/physrevb.46.15438 UR - https://pubmed.ncbi.nlm.nih.gov/10003665/ ID - 10003665 ER -