by Daykov, I P, Arias, T A, Engeness, Torkel D
Published in Physical review letters (30.05.2003)

by Proykova, A., Pisov, S., Radev, R., Mihailov, P., Daykov, I., Berry, R.S.
Published in Vacuum (14.10.2002)

by Daykov, I. P, Engeness, T. D, Arias, T. A
Year of Publication 18.04.2002

by Daykov, I P, Engeness, T D, Arias, T A
Published in arXiv.org (25.02.2003)