Culley, Theresa M.; Hardiman, Nicole A. (1 December 2007). "The Beginning of a New Invasive Plant: A History of the Ornamental Callery Pear in the United States". BioScience. 57 (11): 956–964. Bibcode:2007BiSci..57..956C. doi:10.1641/b571108. ISSN1525-3244.
Culley, Theresa M.; Hardiman, Nicole A. (1 December 2007). "The Beginning of a New Invasive Plant: A History of the Ornamental Callery Pear in the United States". BioScience. 57 (11): 956–964. Bibcode:2007BiSci..57..956C. doi:10.1641/b571108. ISSN1525-3244.
Lyle, Katie Letcher (2010) [2004]. The Complete Guide to Edible Wild Plants, Mushrooms, Fruits, and Nuts: How to Find, Identify, and Cook Them (2nded.). Guilford, Connecticut: FalconGuides. p.105. ISBN978-1-59921-887-8. OCLC560560606.
Culley, Theresa M.; Hardiman, Nicole A. (1 December 2007). "The Beginning of a New Invasive Plant: A History of the Ornamental Callery Pear in the United States". BioScience. 57 (11): 956–964. Bibcode:2007BiSci..57..956C. doi:10.1641/b571108. ISSN1525-3244.