Ganguly; Le Fevre Journal of the Chemical Society, 1934 , p. 848,851 Full Text Show Details Qvist Acta Academiae Aboensis, Series B: Mathematica et Physica, 1939 , vol. 12, # 1 p. 3,11 Acta Academiae Aboensis, Series B: Mathematica et Physica, 1939 , vol. 12, # 7 p. 3,24 Full Text Show Details Qvist; Moilanen Acta Academiae Aboensis, Series B: Mathematica et Physica, 1943 , vol. 14, # 3 p. 6