1. Susceptibility tests: diffusion test procedures;Barry,1991
2. Applicability of diffusion methods required by the pharmacopoeias for testing antibacterial activity of natural compounds;Brantner;Pharmazie,1994
3. Plant growth-promoting activities among rhizobacteria in Finnish forest soils;Elo,1997
4. Which extractant should be used for the screening and isolation of antimicrobial components from plants?;Eloff;Journal of Ethnopharmacology,1998
5. Härmälä P., 1991. Study on the Isolation and Chromatographic Behaviour of Coumarins from Angelica (Angelica archangelica) Roots. J-Paino Ky, University of Helsinki, thesis.