scientific article published on 01 January 1976

scientific article published on 01 January 1973

scientific article published on January 1, 1979

scientific article published on 01 January 1970

scientific article published on March 1, 1975

scientific article published on October 10, 1977

scientific article published on January 1, 1979

scientific article

scientific article published on 01 January 1971

scientific article published on 01 January 1980

scientific article published in January 1977

scientific article published on April 2, 1979

scientific article published on 01 January 1977

scientific article published on January 1, 1977

scientific article published on January 1, 1976

scientific article published on January 1976

scientific article published on April 30, 1979

scientific article published on October 15, 1975

scientific article published on 01 January 1973

scientific article published on January 1, 1978

scientific article published on January 1, 1972

scientific article published on January 1, 1972

scientific article published on 01 November 1971

scientific article published in January 1981

scientific article

scientific article published on December 1, 1975

scientific article published on 01 January 1967

scientific article published on 01 September 1963

scientific article published on 01 September 1971

scientific article published on 01 January 1976

scientific article published on June 1, 1977

scientific article published on January 1, 1975

scientific article published in January 1968

scientific article published on 01 January 1981

scientific article published on 01 January 1962

scientific article published on 01 July 1976

scientific article published on 01 May 1977

scientific article published on 01 January 1980

scientific article published on 01 January 1980