GONZÁLEZ DÍAZ, Fernando Ricardo; 						GARCÍA SALCEDO, Ricardo.
 Counting letters of a sentence with fingers and matrices.
<strong>CIENCIA ergo-sum</strong>, [S.l.], v. 31, june 2024.
ISSN 2395-8782.
Available at: &lt;<a href="https://cienciaergosum.uaemex.mx/article/view/20935" target="_new">https://cienciaergosum.uaemex.mx/article/view/20935</a>&gt;. Date accessed: 18 aug. 2026.
doi: <a href="https://doi.org/10.30878/ces.v31n0a19">https://doi.org/10.30878/ces.v31n0a19</a>.