1990 Walnut Production in China Siebert, Jerome B., G. Steven Sibbett, Robert Merrill, Craig McNamara. 1990.
2012 Control of Walnut Husk Fly using Reduced Risk Products Van Steenwyk, R.A., A. Verhaeghe, C.A. Leslie, W.W. Coates, J.A. Grant, J.K. Hasey, C.J. DeBuse 2012.