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2. Michigan Trees: A Guide to the Trees of the Great Lakes Region;Barnes,2004
3. Croxton, R.J., 1966. Detection and classification of ash dieback on large-scale color aerial photographs. USDA For. Serv. Res. Paper, PSW-RP-35.
4. Erdmann, G.G., Crow, T.R., Peterson, R.M., Wilson, C.D., 1987. Managing black ash in the Lake States. USDA For. Serv. Gen. Tech. Rep., NC-115.
5. The beech bark disease, a Nectria disease of Fagus, following Cryptococcus fagi (Baer.);Ehrlich;Can. J. Res.,1934