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Communicated by J. Serrin
This research was partially supported by the National Science Foundation under grants NSP GP 34260 and MCS 78 02179.
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Bamberger, A., Rauch, J. & Taylor, M. A model for harmonics on stringed instruments. Arch. Rational Mech. Anal. 79, 267–290 (1982). https://doi.org/10.1007/BF00250794
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DOI: https://doi.org/10.1007/BF00250794