J. Wang, T. L. Niblack, J. A. Tremain, W. J. Wiebold, G. L. Tylka, C. C. Marett, G. R. Noel, O. Myers, M. E. Schmidt,
Soybean Cyst Nematode Reduces Soybean Yield Without Causing Obvious Aboveground Symptoms. Plant Disease. ,vol. 87, pp. 623- 628 ,(2003) ,
10.1094/PDIS.2003.87.6.623