11) Fröberg J.C., Rojas O.J., Claesson P.M., Surfaces forces and measuring techniques. International Journal of Mineral Processing, 1999. 56, 1-30. (DOI: 10.1016/S0301-7516(98)00040-4)

10) Rojas O.J., Neuman R.D., Adsorption of polysaccharide wet-end additives in papermaking systems, Colloids and Surfaces A., 1999, 155, 419-432. (DOI: 10.1016/S0927-7757(99)00040-0)

9) Rojas O.J., Claesson P.M., Muller, D., Neuman R.D., The effect of salt concentration on adsorption of low-charge-density polyelectrolytes and interactions between polyelectrolyte-coated surfaces, Journal of Colloid and Interface Science, 1998, 205, 77-88. (DOI: 10.1006/jcis.1998.5596)

8) Rojas O.J., Avances en el Reciclado del Papel, Celulosa y Papel de Venezuela, 1997, 9(16): 22-23.

7) Rojas O.J., Salager J.L., Surface activity of bagasse lignin derivatives found in the spent liquor of soda pulping plants, Tappi Journal, 1994, 77(3), 169-174.

6) Forgarini A., Rojas O.J., Belandria J., Vapor-liquid equilibrium computer system, Revista Información Tecnológica, 1993, 4(2), 35-38.

5) Rojas O.J., Uzcategui W., Delignification of sugar-cane bagasse by soda pulping process, Investigación y Técnica del Papel, 1992, 29(113), 680-695.

4) Peña V., Rojas O.J., Pinus Caribaea var Hondurensis fiber characterization for papermaking from nirgua plantation. Celulosa y Papel de Venezuela, 1992, 3(6), 6-15.

3) Salager J.L., Peña V., Rojas O.J., Interfacial phenomena and surfactants in the pulp and paper industry. Celulosa y Papel de Venezuela, 1991, 3(5), 50-61).

2) Rojas O.J., Villabona J., Computer-based-system for mass and energy balances in CTMP plants. Ciencia e Ingeniería, 1990, 20(1), 67-80.

1) Rojas O.J., Monsalve A., Peña V., Kinetic Model for the Kraft Digestion of Pinus caribaea. Celulosa y Papel de Venezuela, 1988, 1(1), 7-12.