SENNIKOV, A. N., and L. SOMLYAY. “<em>Atlas Florae Europaeae</em> Notes 32. The Revised Identity of <em>Sorbus lanuginosa</Em> (Rosaceae)”. Phytotaxa, vol. 338, no. 1, Feb. 2018, pp. 145–148, doi:10.11646/phytotaxa.338.1.15.