C. L. Cantrell, Zheljazkov, V. D., Osbrink, W. L. A., Castro, A., Maddox, V., Craker, L. E., and Astatkie, T.,
“Podophyllotoxin and essential oil profile of Juniperus and related species”,
Industrial Crops and Products, vol. 43, pp. 668-676, 2013.
V. D. Zheljazkov, Cantrell, C. L., Astatkie, T., and Hristov, A. N.,
“Yield, content, and composition of peppermint and spearmints as a function of harvesting time and drying”,
J. Agric. Food Chem. , vol. 58, pp. 11400-11407, 2010.