Spaeth; Hromatka Monatshefte fuer Chemie, 1932 , vol. 60, p. 117,128 Full Text Show Details Brunner; Hofer; Stein Monatshefte fuer Chemie, 1933 , vol. 63, p. 79,95 Full Text Show Details Ruzicka; Ehmann Helvetica Chimica Acta, 1932 , vol. 15, p. 140,157