GASTGEBER (Ch.), John of Piano Carpini and William Rubruck. Rereading their treatises about the Mongols from a sociolinguistic point of view, dans CURTA (F.) et MALEON (B.-P.), &The Steppe Lands and The World Beyond Them: Studies in honor of Victor Spinei on his 70th birthday&, Iasi, 2013, 355-376