Sjoequist Arkiv foer Kemi, 1957 , vol. 11, p. 129,130,132 Full Text Show Details Edman Acta Chemica Scandinavica (1947-1973), 1950 , vol. 4, p. 277,281 Full Text Show Details Fraenkel-Conrat; Harris Journal of the American Chemical Society, 1954 , vol. 76, p. 6058,6059,6061