N. Bernabeu, P. Saramito & C. Smutek. (1970). Numerical Modeling of Non-Newtonian Viscoplastic Flows: Part II. Viscoplastic Fluids and General Tridimensional Topographies.
            <i>International Journal of Numerical Analysis and Modeling</i>. <i>11</i> (1).
            213-228.
         doi: