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Cusmano
Atti X. Congr. int. Chim. Rom, 1938 , p. B. 3, S. 110, 115
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Cusmano
Gazzetta Chimica Italiana, 1948 , vol. 78, p. 622,628
Atti X. Congr. int. Chim. Rom, 1938 , p. Bd. 3, S. 110, 118