de Souza MP. Pilon-Smits EA, Lytle CM, Hwang S, Tai J, Honma TS, Yeh L, Terry N. (1998) Rate-limiting steps in selenium assimilation and volatilization by Indian mustard. Plant Physiol 117: 1487–1494 [PMC free article] Elrashidi MA, Adriano DC, Workman SM, Lindsay WL. (1987) Chemical equilibria of selenium in soils: a theoretical development.