“Flow Modelling in a Straight Hard-Walled Duct With Two Rectangular Axisymmetric Narrowings”. Bulletin of V.N. Karazin Kharkiv National University, Series «Mathematical Modeling. Information Technology. Automated Control Systems», vol. 44, Dec. 2019, pp. 4-15, https://doi.org/10.26565/2304-6201-2019-44-01.