[1][2][3]

1. ↑ Henning Christophersen Den Store Danske, Gyldendals åbne encyclopædi
2. ↑ Kristensen, Gustav N. 2010. Born into a Dream. EuroFaculty and the Council of the Baltic Sea States. Berliner Wissentshafts-Verlag. ISBN 978-3-8305-1769-6.
3. ↑ "Venstre-legenden Henning Christophersen er død" (in Danish). 1 January 2017. Retrieved 2017-01-02.