1. Clitics in lexical phonology: alleged counterevidence?;Aguado;Linguistische Berichte,1989
2. Andersson, L.-G., 1975. Form and Function of Subordinate Clauses. Monographs in Linguistic 1, Department of Linguistics, University of Gothenburg.
3. Wackernagel's revenge: clitics, morphology, and the syntax of verb-second position;Anderson;Language,1993
4. Bański, P., 2000. Morphological and Prosodic Analysis of Auxiliary Clitics in Polish and English. Ph.D. dissertation, Warsaw University.
5. Bentzen, K., Hrafnbjargarson, G.H., Hróarsdóttir, Th., Wiklund, A.-L., 2007. The Force Behind V2. Paper presented at The 22nd Comparative Germanic Syntax Workshop, Stuttgart, Germany.