Bottomley; Lapworth; Walton
Journal of the Chemical Society, 1930 , p. 2215
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Mahn; Summers
Journal of the American Chemical Society, 1951 , vol. 73, p. 362
Robba
Annales de Chimie (Cachan, France), 1960 , vol. <13>5, p. 351,399,402
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Robba; Delaby
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1959 , vol. 248, p. 250