(in French and German)"Mémorial A, 1843, No. 17"(PDF). Service central de législation. p. 45. Archived from the original(PDF) on 5 March 2016. Retrieved 26 April 2014.
(in French and German)"Mémorial A, 1843, No. 17"(PDF). Service central de législation. p. 45. Archived from the original(PDF) on 5 March 2016. Retrieved 26 April 2014.