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Pereira, S. I., P. A. G. Santos, J. G. Barroso, A. C. Figueiredo, L. G. Pedro, L. R. Salgueiro, S. G. Deans, and J. J. C. Scheffer. Chemical Polymorphism of the Essential Oils from Populations of Thymus Caespititius Grown on the Islands Pico, Faial and Graciosa (Azores). 2003.

Pereira, S. I., et al. Chemical Polymorphism of the Essential Oils from Populations of Thymus Caespititius Grown on the Islands Pico, Faial and Graciosa (Azores). 2003.