"Connecticut's Endangered, Threatened and Special Concern Species 2015". State of Connecticut Department of Energy and Environmental Protection Bureau of Natural Resources. Retrieved 7 January 2017. (Note: This list is newer than the one used by plants.usda.gov and is more up-to-date.)
Elden J. Stang; Gavin G. Weis & John Klueh (1990). "Lingonberry: Potential New Fruit for the Northern United States". In J. Janick & J.E. Simon (eds.). Advances in new crops. Timber Press. pp. 321–323.