TY - RPRT TI - A direct finite element analysis method for particle mechanics: the three-body problem. AU - B Balko AU - R L Berger PY - 1969 DO - 10.1016/0303-2647(69)90026-4 UR - https://pubmed.ncbi.nlm.nih.gov/5359032/ ID - 5359032 ER -