Hauke-Kowalska, M., Borowiak, E., Barzdajn, W., Kowalkwski, W., Korzeniewicz, R., & Wawro, T. (2019). Cone and seeds variability in seed orchards and seed stands of Pinus sylvestris L . Baltic Forestry, 25(2), 187–192. https://doi.org/10.46490/vol25iss2pp187