(in French and German)"Mémorial A, 1907, No. 37"(PDF). Service central de législation. Archived from the original(PDF) on 26 February 2008. Retrieved 14 January 2008.
(in French and German)"Mémorial A, 1907, No. 37"(PDF). Service central de législation. Archived from the original(PDF) on 26 February 2008. Retrieved 14 January 2008.