scientific article published in 1986

scientific article published in 1996

scientific article published in 1986

scientific article published in 1983

scientific article published in 1993

scientific article (publication date: 30 June 1976)

scientific article published in 1983

scientific article published in 1993

scientific article published in 1988

scientific article published in 1978

scientific article published in 1978

scientific article published in 1995

scientific article published in 1988

scientific article published in 1988

scientific article published in 1996

scientific article published in February 1967

scientific article published in 1978

scientific article published in 1969

scientific article published in 1985

scientific article published in 1985

scientific article published in 1991

scientific article published in 1969

scientific article published in 1993

scientific article published in 1993

scientific article published in 1973

scientific article published in 1993

scientific article published in 1993

scientific article published on 01 September 1996

article published in 1991

scientific article published in 1989

scientific article published in 1989

scientific article published in 1988

scientific article published in 1989

scientific article published in 1989

scientific article published in 1984

scientific article published in 1988

scientific article published in 1998

scientific article published in 1988

scientific article published in 1973

scientific article published in 1972