scientific article published in March 1965

scientific article published on January 1, 1979

scientific article published in January 2002

scientific article published on January 1989

scientific article published on February 1, 1975

scientific article published in March 1999

scientific article published on October 1, 1979

scientific article published on 14 April 2008

scientific article published in October 1974

scientific article published on January 1983

scientific article published on December 21, 2010

scientific article published on September 1, 1971

scientific article published in September 1961

scientific article published in September 1958

scientific article published on October 1, 1970

scientific article published on March 1, 1970