The Fables of Marie de France, ed. Mary Lou Martin, Birmingham AL, pp. 56–58; Google Books
"The Heifer, the Goat and the Lamb in Consort with the Lion", translated by Norman Shapiro, in The Complete Fables of Jean de La Fontaine, University of Illinois 2010, pp. 8–9
The differences in interpretation between three versions of the fable is discussed in the article Societas Leonina or the lion's share by Brian Møller Jensen, in Eranos: Acta philologica Suecana Vol. CII (2004), pp. 97–104