For citations:
Nikonova N.N., Hurshkainen T.V., Kuchin A.V. Mathematical planning of experiments to optimize the extraction of extractive substances from needles of Pinus sylvestris. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2021;(235):221-237. (In Russ.) https://doi.org/10.21266/2079-4304.2021.235.221-237