Khalil Gardezi, Abdul. “Copper Absorption and Characteristics of Leucaena Leucocephala Associated With Glomus Spp. And Rhizobium in Polluted Soil of the Lerma River, Mexico”. REVISTA TERRA LATINOAMERICANA, vol. 24, no. 3, Sept. 2006, p. 347, https://mail.terralatinoamericana.org.mx/index.php/terra/article/view/1488.