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\bibitem{Vansant_etal1996} {\textquotedblleft}\textit{Strong-coupling limit for one-dimensional polarons in a finite box}{\textquotedblright}. Vansant P, Smondyrev MA, Peeters FM, Devreese JT, Zeitschrift f{\"u}r Physik: B: condensed matter and quanta \textbf{99}, 345 (1996).   http://doi.org/10.1007/s002570050047

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