Hien, H. N., Diep, N. V., Hai, D. N. and Canh, N. V. (1999) “An algorithm for simultaneous determination of pressure and temperature distribution in oil-producing tube flow and the counter flow in gas-lift annulus”, Vietnam Journal of Mechanics. Hanoi, Vietnam, 21(2), pp. 99–115. doi: 10.15625/0866-7136/9991.