scientific article published on 01 March 1989

scientific article published on 01 May 1990

scientific article published in Physical Review Letters

scientific article published in Physical Review Letters

scientific article published on 01 May 1994

scientific article published in Physical Review Letters

scientific article published in Physical Review Letters

scholarly article

scientific article published in Physical Review Letters

scientific article published in Physical Review Letters

scientific article published on 01 October 1991

scientific article published on 01 August 1995

scientific article published on 01 May 1992

scientific article published in Physical Review Letters

scientific article published in Physical Review Letters

scientific article

scientific article published in Physical Review Letters

scientific article published on 01 October 1992

scientific article published on 29 June 2017

scientific article published on 4 March 2014

scientific article published on 01 October 1987

scientific article published in Physical Review Letters

scientific article published on 20 April 2016

scientific article

scientific article published on 01 December 1989

scientific article published on 01 June 1993

scientific article published on 01 July 1989

scientific article published in Physical Review Letters

scientific article published in Physical Review Letters

scientific article published on 01 January 1988

scientific article published in Physical Review Letters

scientific article published on 11 January 2017

scientific article published on 20 April 2016

scientific article published on 01 October 1995

scientific article published on 01 February 1994

scientific article published in Physical Review Letters

scientific article published on 01 January 1990

scientific article published in Physical Review Letters

scientific article published in Physical Review Letters

scientific article published in Physical Review Letters

scientific article published on 01 June 1989