TY - RPRT TI - Variational calculation for large bipolarons in the strong-coupling limit. AU - Qinghu Chen AU - Kelin Wang AU - Shaolong Wan PY - 1994 DO - 10.1103/physrevb.50.164 UR - https://pubmed.ncbi.nlm.nih.gov/9974527/ ID - 9974527 ER -