scientific article published in 1958

scientific article published in 1975

scientific article published in 1979

scientific article published in 1978

scientific article published in 1982

scientific article published in 1989 (obituary)

scientific article published in 1957

scientific article published in 1968

scientific article published in 1960

scientific article published in 1978

scientific article published 1984

scientific article published in 1986

scientific article published in 1975