Bogoljubsski
Zhurnal Obshchei Khimii, 1962 , vol. 32, p. 869,870
J. Gen. Chem. USSR (Engl. Transl.), 1962 , vol. 32, p. 862,863

Bush Inc.
Patent: US2291804 , 1939 ;

Pospisil,J. et al.
Collection of Czechoslovak Chemical Communications, 1966 , vol. 31, p. 98 - 105

Calcott; Tinker; Weinmayr
Journal of the American Chemical Society, 1939 , vol. 61, p. 1010,1014
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Bogoljubsski
Zhurnal Obshchei Khimii, 1962 , vol. 32, p. 869,870
J. Gen. Chem. USSR (Engl. Transl.), 1962 , vol. 32, p. 862,863

Calcott; Tinker; Weinmayr
Journal of the American Chemical Society, 1939 , vol. 61, p. 1010,1014

Bayrac
Bulletin de la Societe Chimique de France, 1895 , vol. <3> 13, p. 979
Annales de Chimie (Cachan, France), 1897 , vol. <7> 10, p. 66,73

Zenker; Jorgensen
Journal of Organic Chemistry, 1959 , vol. 24, p. 1351