Popova, Gergana; Simov, Kiril and Osenova, Petya. 2002. ‘An HPSG-based Syntactic Treebank of Bulgarian (BulTreeBank)’. In: Anthony McEnery; Paul Rayson and Andrew Wilson, eds. A Rainbow of corpora: Corpus Linguistics and the Languages of the world. Munich: Lincom Europa, pp. 135-142. ISBN 978-3895868726 [Book Section]