E. A. Jeliazkova, Zheljazkov, V. D., Craker, L. E., Yankov, B., and Georgieva, T.,
“NPK FERTILIZER AND YIELDS OF PEPPERMINT, MENTHA X PIPERITA”,
Acta Horticulturae, no. 502, pp. 231 - 236, 1999.
V. D. Zheljazkov, Jeliazkova, E. A., Craker, L. E., Yankov, B., Georgieva, T., Kolev, T., Kovatcheva, N., Stanev, S., and Margina, A.,
“HEAVY METAL UPTAKE BY MINT”,
Acta Horticulturae, no. 500, pp. 111 - 118, 1999.
V. D. Zheljazkov, Topalov, V., Yankov, B., Terziev, J., and Dimitrov, I.,
“Changes in the quality of Mentha rhizome as depending on the time of overground mass harvesting and the method of weed control”,
Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 37, pp. 239-247, 1992.