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What a brillant scientific and academic carreer in sometimes difficult conditions!
(A. Albert, 2016-06-30)
This is a significant addition to the history of contemporaneous astronomy.
(L. Houziaux, 2016-06-24)
What a heroic life and so full of rich meaning and dedication.
(S. Rayner, 2016-11-10)
Review in "Le Ciel", September 2016
Review in "l'Astronomie", December 2016
Review in "Observatory", April 2017
Citation at the IAU GA, Vienna, September 2018