G. Havas, J. Sawinsky, and A. Deák, “INVESTIGATION OF THE HOMOGENIZATION EFFICIENCY OF THE SCREW AGITATOR, HELICAL RIBBON AGITATOR, GATE TYPE ANCHOR IMPELLER AND THE MULTI-PADDLE AGITATOR IN THE MIXING OF HIGH-VISCOSITY NEWTONIAN LIQUIDS”, Period. Polytech. Chem. Eng., vol. 22, no. 4, pp. 317–330, Jan. 1978.