Письменный, Е. Н., В. А. Кондратюк, Ю. В. Жукова, and А. М. Терех. “Convective Heat Exchange of Cross-Section-Washed Staggered Packages of Plainly-Oval Tubes”. Eastern-European Journal of Enterprise Technologies, vol. 2, no. 8(50), Jan. 2012, pp. 4-8, doi:10.15587/1729-4061.2011.1829.