Copyright © 2011 Yingxin Guo and Junchang Wang. This is an open access article distributed under the
Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
By employing a generalized Riccati technique and an integral averaging technique, some new oscillation criteria are established for the second-order matrix differential system , , where , , and are -matrices, and , are Hermitian. These results are sharper than some previous results.