Additional references

• Murray, A.E., 1970. A monograph of the Aceraceae. Unpublished Ph.D. dissertation, The Pennsylvania State University. Reference page. 

• Gelderen, D.M. van, Jong, P.C.de & Oterdoom, H.J. 1994. Maples of the world. Timber Press, Portland, Or., 458 pp. ISBN 0-88192-000-2. Reference page. 

• Govaerts, R.H.A. 1995. World Checklist of Seed Plants 1(1, 2). 483, 529 pp. MIM, Deurne. ISBN 90-341-0852-X (issue 1) ISBN 90-341-0853-8 (issue 2). Reference page. 

Links

• USDA, ARS, Germplasm Resources Information Network. Acer opalus in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed on 08-Apr-12.

• Crowley, D. & Rivers, M.C. 2018. Acer opalus. The IUCN Red List of Threatened Species 2018. IUCN Red List Category: Least Concern . DOI: 10.2305/IUCN.UK.2018-1.RLTS.T193844A2285496.en .

• Govaerts, R. et al. 2020. Acer opalus in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2020 January 11.

• International Plant Names Index. 2020. Acer opalus. Published online. Accessed 11 January 2020.