1. Ringbom, H.: Cross-linguistic similarity in foreign language learning. Multilingual Matters, Clevedon (2007)
2. Laufer, B., Goldstein, Z.: Testing vocabulary knowledge: Size, strength and computer adaptiveness. Language Learning 54(3), 399–436 (2004)
3. Gibson, M., Hufeisen, B.: Investigating the role of prior foreign language knowledge: Translating from an unknown into a known foreign language. In: Cenoz, J., Hufeisen, B., Jessner, U. (eds.) The Multilingual Lexicon, Kluwer Academic Publishers, Dordrecht (2003)
4. Gonzalo, J.: Scenarios for interactive cross-language information retrieval systems. In: Proceedings of SIGIR 2002 Workshop on Cross-Language IR (2002)
5. Zazo Rodriguez, A.F., Figuerola, C., Alonso Berrocal, J.L., Fernandez Marcial, V.: iCLEF 2005 at REINA-USAL: Use of free on-line machine translation programs for interactive cross-language question answering (2005)