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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Burguer model comprising the Maxwell and Kelvin-Voigt models in series. S1 and D3 correspond to the Maxwell spring and dashpot, respectively, while S2 and D2 represent their Kelvin-Voigt counterparts.