Muller, J. Dict. abrége des imprimeurs/éditeurs francais du seizième siècle, 1970 p. 74 (Robert Estienne (Stephanus))
Répertoire d'imprimeurs/libraires XVIe-XVIIIe siècle, 1997 (Estienne, Robert; b. 1503?; d. 7 Sept. 1559; also Roberto Stephano; printer and bookseller; active in Paris 1526-1550, with Paris imprints dated into 1551; in Nov. 1550 he left Paris for Geneva, where he was active 1551-1559)