“Copper losses and Factors limiting the matte-slag equilibrum in the Chagres flash smelting furnace”.N. Cardona, R. Parra, L. Hernandez, P.Coursol, P.J. Mackey, R. Parada. Summited to Metallurgical and Materials Transactions B.

“Optimizing Peirce–Smith Converters Using Thermodynamic Modeling and Plant Sampling”. N. Cardona, P.J. Mackey, P. Coursol, R. Parada, and R. Parra, Journal of Metals, Vol 64, N°5, May 2012, pp 546-550.

“Application of MDN to study bricks corrosionin Pierce Smith”. L. F. Verdeja, R. Parra, R. Parada, A. Alfonso, C. Marcos, Christian Goñi, Mª. F. Barbés..Boletín de la Soc. Cerámica y Vidrio de España, Vol 43, Nº2, Marzo – Abril 2004, pp 203-206.

“Dynamic Simulation of a Flash Furnace” R. Parada, R. Parra and I. Wilkomirsky. Canadian Metallurgical Quarterly, Vol 33, No.4, Dic. 2004, pp 561-570