"Malus niedzwetzkyana". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA)
biodiversitylibrary.org
Nash, George V. "Malus niedzwetzkyana". In Addisonia: Colored Illustrations and Popular Descriptions of Plants, vol. 6. The New York Botanical Garden (Addison Brown Fund), 1921, tr. 23–24