1. A. S. Potlog, Heil Gewuerz-Pflanz., 17, 24 (1936).
2. I. Manta and C. Weinrich, Pharm. Monatsh., 15, 187 (1934).
3. A. Bogucka-Kocka, H. D. Smolarz, and J. Kocki, Fitoterapia, 79, 7-8, 487 (2008).
4. E. Korbel, A. Bighelli, A. Kurowska, D. Kalemba, and J. Casanova, Nat. Prod. Commun., 3, No. 2, 113 (2008).
5. E. Le Claire, S. Schwaiger, B. Banaigs, H. Stuppner, and F. Gafner, J. Agric. Food Chem., 53, No. 11, 4367 (2005).