EXHIBIT A AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13GAgreement Regarding Joint Filing of Statement on Schedule 13d or 13g • April 19th, 2011 • Sandridge Energy Inc • Crude petroleum & natural gas
The undersigned agree to file jointly with the Securities and Exchange Commission (the “SEC”) any and all statements on Schedule 13D or Schedule 13G (and any amendments or supplements thereto) required under section 13(d) of the Securities Exchange Act of 1934, as amended, in connection with purchases by the undersigned of the common units of beneficial interest of SandRidge Mississippian Trust I.
