NESSIER, MarĂ­a Celeste et al. Marketing techniques and optional labeling in food packaging: Use and effect on preferences and consumption in children and adolescent. CIENCIA ergo-sum, [S.l.], v. 28, n. 2, june 2021. ISSN 2395-8782. Available at: <https://cienciaergosum.uaemex.mx/article/view/13669>. Date accessed: 09 sep. 2026. doi: https://doi.org/10.30878/ces.v28n2a7.