scientific article published in January 1972

scientific article published in January 1999

scientific article published in January 1995

scholarly article

scientific article published on 01 March 2007

scientific article published in January 1994

scholarly article

article

scientific article published in January 2006

scientific article

scholarly article published in September 1969

scientific article published in January 1968

scholarly article

scholarly article

scientific article

Article from "Scientific American" published in 1978

scientific article published in January 1992

scientific article published in Nature

scholarly article

scientific article published on 8 June 2022

scientific article published in the Astrophysical Journal