Interrogative and negative constructions in sign languages / ed. by Ulrike ZeshanPossessive and existential constructions in sign languages / ed. by Ulrike Zeshan and Pamela PernissSign languages in village communities : anthropological and linguistic insights / ed. by Ulrike Zeshan, Connie de VosSign languages in village communities : anthropological and linguistic insights / ed. by Ulrike Zeshan, Connie de Vos