scientific article published in 1947

scientific article published in 1941

scientific article published in 1941

scientific article published in 1973

scientific article published in 1947

scientific article published on 7 December 1938

scientific article published on 7 June 1973

scientific article published on 7 December 1942

scientific article published in 1943

scientific article published on 7 June 1973

scientific article published in 1937

scientific article published on 7 December 1942

scientific article published in 1943

scientific article published in 1947

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scientific article published in 1953