Freidlin, L. Kh.; Lebedeva, A. I. Zhurnal Prikladnoi Khimii (Sankt-Peterburg, Russian Federation), 1937 , vol. 10, p. 1086 - 1094 C. I, 1938 , p. 3000 Full Text Show Details Gmelin Handbook: Na: SVol.4, 16, page 1402 - 1403