Zadorozhnyi, Andrii, et al. “Flow of a Bingham Fluid Through Circular Pipes With Variable Viscosity Coefficient Along the Pipe Length”.
International Journal of Engineering and Technology, vol. 7, no. 4.3, Sept. 2018, pp. 100-4,
https://doi.org/10.14419/ijet.v7i4.3.19716.