ZHAO, Ling.
 Global Attractor of the Nonlinear Four Order Wave Equations.
<strong>Global Journal of Science Frontier Research</strong>, [S.l.], aug. 2013.
ISSN 2249-4626.
Available at: &lt;<a href="https://journalofscience.org/index.php/GJSFR/article/view/929" target="_new">https://journalofscience.org/index.php/GJSFR/article/view/929</a>&gt;. Date accessed: 19 may 2022.