Parry Moon, A system of photometric concepts, in Journal of the Optical Society of America, vol. 32, n. 6, June 1942, p. 356, Bibcode:1942JOSA...32..348M.
«The unit is pi times the lumens per square meter per steradian. Such a name is impossibly cumbersome, so a new name is proposed, the blondel, after André Blondel who did pioneer work in photometric nomenclature.»