Carvajal Loaiza, Manuel José, et al. “Influence of the Printing Position and the Infill Density on the Mechanical Properties of 3D Printed ABS Specimens”. Revista Ingenierías Universidad De Medellín, vol. 19, no. 37, Mar. 2020, pp. 179-93, doi:10.22395/rium.v19n37a9.