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Salazar, S.E., Coffman, R.A. Discussion of “a photogrammetry-based method to measure total and local volume changes of unsaturated soils during triaxial testing” by Zhang et al. (doi:10.1007/s11440-014-0346-8). Acta Geotech. 10, 693–696 (2015). https://doi.org/10.1007/s11440-015-0380-1
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DOI: https://doi.org/10.1007/s11440-015-0380-1