参考文献

du Pont de Nemours and Co. Patent: US2073363 , 1932 ; Full Text Show Details Carothers; Berchet; Collins Journal of the American Chemical Society, 1932 , vol. 54, p. 4070 Full Text Show Details du Pont de Nemours and Co. Patent: US1950431 , 1930 ; Full Text Show Details du Pont de Nemours and Co. Patent: DE588708 , 1931 ; Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 20, p. 161