Lima, J.D.C. et al. 2019. Content and composition of essential oil in lemon balm (Lippia alba (Mill) N.E.Br.) grown with ammonium and nitrate in light environments. Revista Colombiana de Ciencias Hortícolas. 13, 1 (Jan. 2019), 120–129. DOI:https://doi.org/10.17584/rcch.2019v13i1.7897.