scientific article published on July 1997

scientific article published in January 1986

scientific article published in January 1981

scientific article published on 01 March 1995

scientific article published in March 1987

scientific article published on January 1, 1998

scientific article published on 01 August 1982

scientific article

scientific article published in 1991

scientific article

scientific article published in January 1991

scientific article published in 1992

scientific article published in 1991

scientific article

scientific article

scientific article published on October 1, 1997

scientific article published in January 1984

scientific article published on 01 January 1995

scientific article published on 01 May 1996

scientific article published on 01 January 1989

scientific article published on September 1995

scientific article published in January 1993

scientific article published on October 1991

scientific article published in July 1991

scientific article published in March 1997

scientific article published in January 1994

scientific article

scientific article published in 1989

scientific article published in May 1989

scientific article published in May 1999

scientific article published on 01 January 1996

scientific article published on 01 January 1990

scientific article published in 1991

scientific article published on January 1, 1998

scientific article published in December 1995

scientific article

scientific article published in January 1996

scientific article published on July 1, 1998

scientific article

scientific article published on 01 February 1989

scientific article

scientific article published on November 1, 1997

scientific article published on 01 January 1998

scientific article published in October 1993

scientific article published in 1988

scientific article

scientific article published on October 1, 1997

scientific article published on July 1, 1997

scientific article published on January 1, 1992

scientific article published in August 1982

scientific article published in July 1996

scientific article

scientific article published on January 1988

scientific article published in 1995

scientific article published in October 1996

scientific article

scientific article published in 1992

scientific article published on February 1, 1998

scientific article published on January 1997

scientific article published on October 1, 1992

scientific article published in January 1987

scientific article published on August 1994

scientific article

scientific article

scientific article

scientific article published in 1992

scientific article published on 01 January 1988

scientific article published in January 1988

scientific article published on 01 February 1986

scientific article

scientific article published on 01 May 1991

scientific article published on 01 December 1993