Wrońska-Wałach, D., Sobucki, M., Buchwał, A., Gorczyca, E., Korpak, J., Wałdykowski, P., & Gärtner, H. (2016). Quantitative analysis of ring growth in spruce roots and its application towards a more precise dating. Dendrochronologia, 38, 61-71. https://doi.org/10.1016/j.dendro.2016.03.009