scientific article published on 01 January 1987

scientific article published on June 22, 1970

scientific article published on 01 September 1975

scientific article published on 01 January 1968

scientific article published on 01 March 1978

scientific article published on December 13, 1971

scientific article published on 01 July 1971

scientific article published on January 1, 1973

scientific article published on July 12, 1971

scientific article published on 01 January 1979

scientific article published on April 20, 1981

scientific article published on 01 January 1992

scientific article published on April 15, 1974

scientific article published on 01 September 1969

scientific article published on 01 January 1970

scientific article published in January 1974

scientific article published in December 1969

scientific article published on 01 September 1970

scientific article published in February 2003

scientific article published on January 1, 1973

scientific article published in February 2002

scientific article published on January 1, 1973

scientific article published on 01 January 1976

scientific article published on 01 January 1975

scientific article published on September 1983

scientific article published in September 2002

scientific article published on 01 March 2002

scientific article published on September 1, 1970

scientific article published on 01 May 2002

scientific article published on 01 January 1967

scientific article published on 01 January 1965

scientific article published on 01 September 1996

scientific article

scientific article published on 01 January 1992

scientific article published on 01 March 2003

scientific article

scientific article published on 01 January 2000

scientific article published on 01 December 2002

scientific article published on 01 June 1966

scientific article published on 01 September 1969

scientific article published on 01 January 1985

scientific article published on 01 August 2001

scientific article published on 01 October 1999

scientific article published on 01 December 2001

scientific article published on 01 January 2002

scientific article published on 01 May 1999

scientific article published on 01 January 1983

scientific article published on 01 May 1973

scientific article published on 01 January 1974

scientific article published on 01 February 2000

scientific article published on 01 January 1999

scientific article published on 01 January 2001

scientific article published on 01 August 1999

scientific article published on 01 March 1993

scientific article published on 01 January 1984

scientific article published on 01 September 1985