Não informado. Chemical abstracts. Formula index: Index of ring systems. American Chemical Society.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Chemical Abstracts. Formula Index: Index of Ring Systems. Columbus, Ohio: American Chemical Society.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Chemical Abstracts. Formula Index: Index of Ring Systems. American Chemical Society.
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