"Archived copy". mdz10.bib-bvb.de. Archived from the original on 20 March 2018. Retrieved 15 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)
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"Archived copy". mdz10.bib-bvb.de. Archived from the original on 20 March 2018. Retrieved 15 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)