The letter to the Prime Minister of Ukraine Arseniy Yatsenyuk and the chairman of the National Bank of Ukraine Valeriya Hontaryeva dated 03.07.2015 № 03.07.2015/1-Вих
The letter of response from the National Bank of Ukraine dated 07.08.2015 № 24-00010/55858
The letter of response from the Ministry of Finance of Ukraine dated 11.08.2015 № 31-14030-10-10/25878