A. Rodríguez Rodríguez, S. Mau Inchaustegui, L. Piedra Castro, R. Jiménez Montealegre, and J. P. Herrera Vargas, “Isolation of ammonium- and nitrite-oxidizing bacterial strains from soil, and their potential use in the reduction of nitrogen in household waste water”, Rev. Biol. Trop., vol. 65, no. 4, pp. 1527–1539, Dec. 2017.