Armenian President Robert Kocharian will officially respond to the letter of Turkish Prime Minister Recep Tayyip Erdogan next week, said Armenian leader's Press Secretary Victor Soghomonian, RFE/RL reported. It should be noted that April 13 Erdogan sent a letter to the Armenian President proposing «to form a joint commission for study of events of 1915 using not only the archives of Armenia and Turkey, but also other countries, to present the results of the research to the international community». In the Turkish Prime Minister's opinion, such an initiative «will shed light to the disputable historical period, as well as will become a move toward the normalization of the relations between the two countries.» It should also be noted that Armenian Prime Minister Andranik Margarian rejected the similar proposal of Turkish FM Abdullah Gul.