This article, which was first published in Alauda journal in 1996, can now be found on the faune-vendee.org website:
• MEYBURG B.-U., MEYBURG Chr., PACTEAU Chr., 2000 – Migration automnale d’un Circaète Jean-le-Blanc Circaetus gallicus suivi par satellite [Autumn migration of a Short-toed Eagle tracked with satellite] // La Gorgebleue, 16 : P. 7-11. – 
(Fr).