Keeping up the pressure on Mukesh Ambani, Anil Ambani has sent a detailed, 500-page note concerning corporate governance in the Reliance empire - an issue he has repeatedly raised in the public feud between the brothers since mid-November.The bulky note sent to the corporate governance committee of the board of directors of Reliance Industries, of which Mukesh is the chairman and Anil the vice-chairman, deals extensively with what the younger brother regards as flaws in corporate governance within the group, informed sources said today.Y P Trivedi, an independent director and head of the board's corporate governance committee, today said the committee was looking into all the issues raised by Anil Ambani.Confirming receipt of the voluminous note sent by RIL vice chairman Anil on issues of corporate governance ahead of the company's board meeting on January 21, Trivedi said: "We have received it. We are looking into it."Trivedi, who was asked to head the committee by the board on December 27, said it would take time to look into the issues raised by Anil.After the January 21 board meeting, Trivedi had said that there was no violation of corporate governance norms, and that everything was in place relating to issues concerning RIL's investment in Reliance Infocomm."He (Anil) has to write to the board, which would refer the matter to the CG panel. There is no shying away from any issue raised or referred to us. We will go through them," Trivedi had told reporters on January 21 when asked about the issues raised by Anil Ambani.