Bordovsky, J. P., W. M. Lyle, and E. Segarra. “Economic Evaluation of Texas High Plains Cotton Irrigated by LEPA and Subsurface Drip”. Texas Journal of Agriculture and Natural Resources, vol. 13, May 2016, pp. 67-73, https://txjanr.agintexas.org/index.php/txjanr/article/view/184.