“Does Continuous Cropping of Maize Contribute to Infestation With Johnsongrass (Sorghum Halepense (L.) Pers.)?”. Pesticides and Phytomedicine Pesticidi I Fitomedicina, vol. 35, no. 3, Mar. 2021, pp. 161-72, https://doi.org/10.2298//PIF2003161S.