Motion, direction and location in languages : in honor of Zygmunt Frajzyngier / ed. by Erin Shay, Uwe SeibertExplaining language structure through systems interaction / Zygmunt Frajzyngier, Erin ShayInteraction of morphology and syntax : case studies in Afroasiatic / ed. by Zygmunt Frajzyngier, Erin ShayThe role of functions in syntax : a unified approach to language theory, description, and typology / Zygmunt Frayzingier with Erin Shay