Musiał, K., K. Pagitz, Z. Gudžinskas, G. Łazarski, and A. Pliszko. “Chromosome Numbers in Hybrids Between Invasive and Native Solidago (Asteraceae) Species in Europe”. Phytotaxa, vol. 471, no. 3, Nov. 2020, pp. 267–275, doi:10.11646/phytotaxa.471.3.8.