Anderson; Short
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Rupe; Brentano
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Ruggli; Preuss
Helvetica Chimica Acta, 1941 , vol. 24, p. 1345,1354
Bertin
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1949 , vol. 229, p. 660
Annales de Chimie (Cachan, France), 1953 , vol. <12> 8, p. 296,314