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Academic Journal
Authors: Knowles, J., Lehtovaara, P., Teeri, T., Penttila, M., Salovuori, I., Andre, L.
Superior Title: Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1987 Apr . 321(1561), 449-454.
Access URL: https://www.jstor.org/stable/37791