[[Books#Geuze_.26_Kriek:_The_Secret_of_Lambic_Beer|''Geuze & Kriek: The Secret of Lambic Beer'']], Van den Steen, p. 60.
[https://archives.bruxelles.be/almanach/watch/AC/AC_1904%20-%2007/AC_1904_PROFESSIONS%20BEROEPEN#page/35 Bruxelles Almanach du Commerce, 1904, p. 987.]
[http://blogs.yahoo.co.jp/brillat_savarin_1/28428527.html Historical info.]