Exhaustive generation of organic isomers. 1. Acyclic structures. - M. Leonor Contreras; Ricardo Valdivia; Roberto Rozas (J. Chem. Inf. Comput. Sci., 1992)

Exhaustive generation of organic isomers. 2. Cyclic structures: new compact molecular code. - M. Leonor Contreras; Ricardo Valdivia; Roberto Rozas (J. Chem. Inf. Comput. Sci., 1992)

Exhaustive Generation of Organic Isomers. 3. Acyclic, Cyclic, and Mixed Compounds. - M. Leonor Contreras; Roberto Rozas; Ricardo Valdivia (J. Chem. Inf. Comput. Sci., 1994)

Exhaustive Generation of Organic Isomers, 4. Acyclic Stereoisomers with One or More Chiral Carbon Atoms. - M. Leonor Contreras; Roberto Rozas; Ricardo Valdivia; R. Agüero (J. Chem. Inf. Comput. Sci., 1995)

Specifying Active Databases in the Situation Calculus. - Leopoldo E. Bertossi; Javier Pinto; Ricardo Valdivia (SCCC, 1998)

Using multiple choice questions as a pedagogic model for face-to-face CSCL. - Ricardo Valdivia; Miguel Nussbaum (Comput. Appl. Eng. Educ., 2009)

Modeling a Collaborative Answer Negotiation Activity Using IMS-Based Learning Design. - Ricardo Valdivia; Miguel Nussbaum; Sergio F. Ochoa (IEEE Trans. Educ., 2009)