Oliva, K. and Sv. Koeva. Sintaksis na nevazmozhnoto (Syntax of the Impossible). – Balgarski ezik, 3, 7-17, 2009. ISSN 0005-4283.

Koeva, Sv. Syntactic Annotation in Bulgarian National Corpus. In: Proceedings from the seventh international conference Formal Approaches to South Slavic and Balkan Languages, Dubrovnik, 35-41, 2010. ISSN 978-953-55375-2-6 pdf file