For citations:
Kulkova A.V., Besschetnova N.N., Besschetnov V.P. Seasonal changes in the pigment composition of needles of representatives of the genus spruce in the Nizhny Novgorod region. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2021;(235):22-39. (In Russ.) https://doi.org/10.21266/2079-4304.2021.235.22-39