scientific article published in March 1989

scientific article

scientific article

scientific article published in April 1986

scientific article

scientific article published on January 1991

scientific article published in November 1988

scientific article published in December 1986

article

scientific article published in January 1983

scientific article published on August 23, 1991

scientific article published in June 1990

scientific article published in December 1985

scientific article published in June 1984

scientific article published in October 1985

scientific article

scientific article published on March 1987

scientific article published on January 1, 1992

scientific article published in May 1984

scientific article published in May 1991

scientific article published in September 1992

scientific article published on October 2000

scientific article published on February 1996

scientific article

scientific article published in December 1986

scientific article published in September 1985

scientific article published in November 1983

scientific article published on January 1984

scientific article published in July 2002

scientific article published on June 1988

scientific article published in May 1984

scientific article published in December 1985

scientific article published on September 1994

scientific article published in January 1982

scientific article published on July 2001