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Isla JA, Cegla FB.Isla JA, et al. Among authors: cegla fb.Proc Math Phys Eng Sci. 2019 May;475(2225):20180831. doi: 10.1098/rspa.2018.0831. Epub 2019 May 8.Proc Math Phys Eng Sci. 2019.PMID: 31236046Free PMC article.