Babajanyan, G. H. “NON-STEADY-STATE FLOW OF REAL INCOMPRESSIBLE FLUID IN PIPE WITH POROUS WALLS”. Proceedings of the YSU A: Physical and Mathematical Sciences, vol. 37, no. 3 (202), Oct. 2003, pp. 45-49, https://doi.org/10.46991/PYSUA.2003.37.3.045.