Maths is Fun. Retrieved 13 January 2015. Alfred S. Posamentier and IngmarLehmann, The Secrets of Triangles, Prometheus Books, 2012: pp. 201–203. Napier's
Bloomsbury Publishing USA. ISBN 978-0-313-34497-8. Posamentier, Alfred S.; Lehmann, Ingmar (20 December 2011). The Glorious Golden Ratio. Prometheus Books.
time, Ullmann is known as the muse and frequent collaborator of filmmaker Ingmar Bergman. She acted in many of his films, including Persona (1966), Cries
Ingmar Ludwig Jung (born 4 April 1978) is a German lawyer and politician of the Christian Democratic Union (CDU) who has been serving as State Minister