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\bibitem{Smondyrev_etal1992} {\textquotedblleft}\textit{Equivalence of 3D bipolarons in a strong magnetic field to 1D bipolarons}{\textquotedblright}. Smondyrev MA, Kochetov EA, Verbist G, Peeters FM, Devreese JT, Europhysics letters \textbf{19}, 519 (1992).   http://doi.org/10.1209/0295-5075/19/6/013

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