1. D. Aharonov, M. Ben-Or, Russell Impagliazzo, Noam Nisan, Limitations of noisy reversible computation, quant-ph/9611028.33quant-ph preprints are available at http://www.arxiv.org/abs/quant-ph/preprint-number
2. A. Ambainis, R. Bonner, R. Freivalds, A. Ķikusts, Probabilities to accept languages by quantum finite automata. Proc. COCOON’99, pp. 174–183. Also quant-ph/9904066.
3. A. Ambainis, R. Freivalds, One-way quantum finite automata: strengths, weaknesses and generalizations, Proc. FOCS’98, pp. 332–341. Also quant-ph/9802062.
4. A. Ambainis, A. Ķikusts, M. Valdats, On the class of languages recognizable by 1-way quantum finite automata, Proc. STACS’01, pp. 75–86. Also quant-ph/0009004.
5. A. Ambainis, J. Watrous, Quantum finite automata revisited, in preparation, 2002.