TY - RPRT TI - Fourier path integrals, partial averaging, and the polaron problem. AU - C Alexandrou AU - W Fleischer AU - R Rosenfelder PY - 1990 DO - 10.1103/physrevlett.65.2615 UR - https://pubmed.ncbi.nlm.nih.gov/10042648/ ID - 10042648 ER -