Pataky Jerald K, Williams Martin M, Headrick John M, Nankam Claude, du Toit Lindsey J, Michener Phillip M
University of Illinois, Department of Crop Sciences, Urbana.
USDA-ARS, Global Change and Photosynthesis Research Unit, University of Illinois, Urbana.
Plant Dis. 2011 Dec;95(12):1492-1506. doi: 10.1094/PDIS-03-11-0236.