Volume 1
Zeshan, Ulrike (Ed.) (2006). Interrogative and negative constructions in sign languages. Sign Language Typology Series No. 1. Nijmegen: Ishara Press.
Volume 2
Zeshan, U. and Perniss, P. (Eds.) (2009). Possessive and existential constructions in sign languages. Sign Language Typology Series No. 2. Nijmegen: Ishara Press.
