BENITEZ, D.; 						HERRERA-SUÁREZ, H. J.; 						MUÑOZ, J. H..
Symmetry in the System of Two Blocks Connected by a String with Variable Tension.
<strong>Revista Cubana de Física</strong>, [S.l.], v. 36, n. 2, p. 139-143, dec. 2019.
ISSN 2224-7939.
Available at: &lt;<a href="http://www.revistacubanadefisica.org/index.php/rcf/article/view/2019v36n2p139" target="_new">http://www.revistacubanadefisica.org/index.php/rcf/article/view/2019v36n2p139</a>&gt;. Date accessed: 04 oct. 2023.