DOI:
10.1055/s-00000058
Planta Medica
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References
Schulz H, Pfeffer S, Quilitzsch R, Steuer B, Reif K.
Rapid and non-destructive determination of the echinacoside content in Echinacea roots by ATR-IR and NIR spectroscopy.
Planta Med 2002;
68: 926-929
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