scientific article published in 1987

scientific article published in January 1986

scientific article published in Astronomical Journal

scholarly article

scientific article published in January 1987

scientific article published in the Astrophysical Journal

scholarly article

scholarly article

scientific article published in January 1980

scientific article published in January 1998

scholarly article

scholarly article

scientific article published in January 2008

scholarly article

scientific article published in January 1995

scientific article published in January 1983

scholarly article

scientific article published in Astronomical Journal

scientific article published in January 1991

scientific article published in January 1989

scientific article published in January 1989

scientific article published in January 2006

scholarly article

scientific article published in 1998

scientific article published in January 1988

scientific article published in January 1981