Evaluation of three machines to remove Armillaria- and annosum-infected stumps.

Omdal, D. W., Shaw, C. G., III, Jacobi, W. R., (2001). Western Journal of Applied Forestry 16(1), 22-25. Society of American Foresters, Bethesda, USA. English language

Variation of pathogenicity and virulence of isolates of Armillaria ostoyae on eight tree species.

Omdal, D. W., Shaw, C. G., III, Jacobi, W. R., Wager, T. C., (1995). Plant Disease 79(9), 939-944. English language