“Anna Leopoldovna”. Biographies. RusArtNet (2016年). 25 August 2019時点のオリジナルよりアーカイブ。25 August 2019閲覧。 “'Nine days after Alexei’s birth, on 19 March 1746, Anna Leopoldovna died of post-natal fever at the age of twenty-seven in Kholmogory'”
web.archive.org
“Anna Leopoldovna”. Biographies. RusArtNet (2016年). 25 August 2019時点のオリジナルよりアーカイブ。25 August 2019閲覧。 “'Nine days after Alexei’s birth, on 19 March 1746, Anna Leopoldovna died of post-natal fever at the age of twenty-seven in Kholmogory'”
