found: Ein lenkbares Luftfahrzeug, 1899:t.p. (Michel Blümelhuber)
found: Österreichischer Bibliothekenverbund online catalogue, viewed 12 February 2016(hdg.: Blümelhuber, Michael, 1865-1936)
found: Michel Blümelhuber : der Stahlschnittmeister in Steyr, 1924
found: Wikipedia, viewed 12 February 2016(Michael Blümelhuber, born 23 September 1865 in Unterhimmel-Christkindl, now a part of Steyr, Upper Austria; died 20 January 1936 in Steyr; a famous Austrian metalcutter; in 1910 he founded a master craftsman studio in Steyr, which closed in 1943)