参考文献
du Pont de Nemours and Co.
Patent: US2102611 , 1933 ;
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Carothers; Collins; Kirby
Journal of the American Chemical Society, 1933 , vol. 55, p. 787
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Carothers; Berchet
Journal of the American Chemical Society, 1933 , vol. 55, p. 2813,2815