Koenigs; Mields; Gurlt Chemische Berichte, 1924 , vol. 57, p. 1183 Full Text Show Details Koenigs; Kinne; Weiss Chemische Berichte, 1924 , vol. 57, p. 1177 Full Text Show Details Koenigs; Bueren; Jung Chemische Berichte, 1936 , vol. 69, p. 2691