INTERNET SOURCE: https://www.marxists.org/history/international/comintern/sections/britain/periodicals/communist_review/1924/09/last_hours.htm
INTERNET SOURCE: http://www.onthisdeity.com/15th-january-1919-%E2%80%93%C2%A0the-murder-of-rosa-luxemburg-and-karl-liebknecht/
INTERNET SOURCE: http://soldierexecutionerprolifer2008.blogspot.com.au/2016/05/freikorps-commander-waldemar-pabast.html