Não informado. Chemical abstracts. Formula index: Index of ring systems. American Chemical Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Chemical Abstracts. Formula Index: Index of Ring Systems. Columbus, Ohio: American Chemical Society.
Lua MLA (8ú heag.)Não informado. Chemical Abstracts. Formula Index: Index of Ring Systems. American Chemical Society.
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