SANROMÁN ARANDA, Roberto.
 "Impact of Covid-19 on the regulation and operation of contractual acts in Mexico".
<strong>CIENCIA ergo-sum</strong>, [S.l.], v. 28, n. 4, june 2021.
ISSN 2395-8782.
Available at: &lt;<a href="https://cienciaergosum.uaemex.mx/article/view/16202" target="_new">https://cienciaergosum.uaemex.mx/article/view/16202</a>&gt;. Date accessed: 09 sep. 2026.
doi: <a href="https://doi.org/10.30878/ces.v28n4a1">https://doi.org/10.30878/ces.v28n4a1</a>.